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Finding the Fourth Proportional to 669,419.76, 923,571.12 and 427,841.76

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Solution

The fourth proportional to 669,419.76, 923,571.12 and 427,841.76 is: 590,275.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,419.76 : 923,571.12 = 427,841.76 : x
  2. Step 2: Convert to fraction form
    669,419.76/923,571.12 = 427,841.76/x
  3. Step 3: Cross multiply
    669,419.76x = 923,571.12 × 427,841.76
  4. Step 4: Simplify right side
    669,419.76x = 395,142,293,465.97
  5. Step 5: Solve for x
    x = 395,142,293,465.97/669,419.76
  6. Step 6: Final answer
    x = 590,275.81

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Double scale
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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.