Home / 521,128.90-781,693.35-311,004.10

Finding the Fourth Proportional to 521,128.90, 781,693.35 and 311,004.10

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Solution

The fourth proportional to 521,128.90, 781,693.35 and 311,004.10 is: 466,506.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,128.90 : 781,693.35 = 311,004.10 : x
  2. Step 2: Convert to fraction form
    521,128.90/781,693.35 = 311,004.10/x
  3. Step 3: Cross multiply
    521,128.90x = 781,693.35 × 311,004.10
  4. Step 4: Simplify right side
    521,128.90x = 243,109,836,792.74
  5. Step 5: Solve for x
    x = 243,109,836,792.74/521,128.90
  6. Step 6: Final answer
    x = 466,506.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.