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Finding the Fourth Proportional to 521,030.62, 781,559.16 and 141,954.40

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Solution

The fourth proportional to 521,030.62, 781,559.16 and 141,954.40 is: 212,935.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,030.62 : 781,559.16 = 141,954.40 : x
  2. Step 2: Convert to fraction form
    521,030.62/781,559.16 = 141,954.40/x
  3. Step 3: Cross multiply
    521,030.62x = 781,559.16 × 141,954.40
  4. Step 4: Simplify right side
    521,030.62x = 110,945,761,622.30
  5. Step 5: Solve for x
    x = 110,945,761,622.30/521,030.62
  6. Step 6: Final answer
    x = 212,935.20

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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.