Home / 521,126.40-781,689.60-311,001.60

Finding the Fourth Proportional to 521,126.40, 781,689.60 and 311,001.60

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Solution

The fourth proportional to 521,126.40, 781,689.60 and 311,001.60 is: 466,502.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,126.40 : 781,689.60 = 311,001.60 : x
  2. Step 2: Convert to fraction form
    521,126.40/781,689.60 = 311,001.60/x
  3. Step 3: Cross multiply
    521,126.40x = 781,689.60 × 311,001.60
  4. Step 4: Simplify right side
    521,126.40x = 243,106,716,303.36
  5. Step 5: Solve for x
    x = 243,106,716,303.36/521,126.40
  6. Step 6: Final answer
    x = 466,502.40

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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.