Home / 669,143.96-923,419.47-363,220.18

Finding the Fourth Proportional to 669,143.96, 923,419.47 and 363,220.18

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Solution

The fourth proportional to 669,143.96, 923,419.47 and 363,220.18 is: 501,244.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,143.96 : 923,419.47 = 363,220.18 : x
  2. Step 2: Convert to fraction form
    669,143.96/923,419.47 = 363,220.18/x
  3. Step 3: Cross multiply
    669,143.96x = 923,419.47 × 363,220.18
  4. Step 4: Simplify right side
    669,143.96x = 335,404,581,491.81
  5. Step 5: Solve for x
    x = 335,404,581,491.81/669,143.96
  6. Step 6: Final answer
    x = 501,244.28

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Half scale
Find fourth proportional to 1,338,287.92, 1,846,838.94 and 726,440.35
Double scale
Find fourth proportional to 669,144.96, 923,420.85 and 363,221.18
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.