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Finding the Fourth Proportional to 486,812.28, 670,843.98 and 372,220.76

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Solution

The fourth proportional to 486,812.28, 670,843.98 and 372,220.76 is: 512,932.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,812.28 : 670,843.98 = 372,220.76 : x
  2. Step 2: Convert to fraction form
    486,812.28/670,843.98 = 372,220.76/x
  3. Step 3: Cross multiply
    486,812.28x = 670,843.98 × 372,220.76
  4. Step 4: Simplify right side
    486,812.28x = 249,702,056,077.03
  5. Step 5: Solve for x
    x = 249,702,056,077.03/486,812.28
  6. Step 6: Final answer
    x = 512,932.94

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Double scale
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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.