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Finding the Fourth Proportional to 521,126.40, 781,948.80 and 205,593.60

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Solution

The fourth proportional to 521,126.40, 781,948.80 and 205,593.60 is: 308,492.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,126.40 : 781,948.80 = 205,593.60 : x
  2. Step 2: Convert to fraction form
    521,126.40/781,948.80 = 205,593.60/x
  3. Step 3: Cross multiply
    521,126.40x = 781,948.80 × 205,593.60
  4. Step 4: Simplify right side
    521,126.40x = 160,763,668,807.68
  5. Step 5: Solve for x
    x = 160,763,668,807.68/521,126.40
  6. Step 6: Final answer
    x = 308,492.66

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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.