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Finding the Fourth Proportional to 631,607.20, 947,948.40 and 257,898.40

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Solution

The fourth proportional to 631,607.20, 947,948.40 and 257,898.40 is: 387,067.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,607.20 : 947,948.40 = 257,898.40 : x
  2. Step 2: Convert to fraction form
    631,607.20/947,948.40 = 257,898.40/x
  3. Step 3: Cross multiply
    631,607.20x = 947,948.40 × 257,898.40
  4. Step 4: Simplify right side
    631,607.20x = 244,474,375,642.56
  5. Step 5: Solve for x
    x = 244,474,375,642.56/631,607.20
  6. Step 6: Final answer
    x = 387,067.11

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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.