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Finding the Fourth Proportional to 478,787.11, 717,959.86 and 141,707.23

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Solution

The fourth proportional to 478,787.11, 717,959.86 and 141,707.23 is: 212,495.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,787.11 : 717,959.86 = 141,707.23 : x
  2. Step 2: Convert to fraction form
    478,787.11/717,959.86 = 141,707.23/x
  3. Step 3: Cross multiply
    478,787.11x = 717,959.86 × 141,707.23
  4. Step 4: Simplify right side
    478,787.11x = 101,740,103,011.79
  5. Step 5: Solve for x
    x = 101,740,103,011.79/478,787.11
  6. Step 6: Final answer
    x = 212,495.49

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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.