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Finding the Fourth Proportional to 418,634.60, 577,730.95 and 239,821.16

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Solution

The fourth proportional to 418,634.60, 577,730.95 and 239,821.16 is: 330,961.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,634.60 : 577,730.95 = 239,821.16 : x
  2. Step 2: Convert to fraction form
    418,634.60/577,730.95 = 239,821.16/x
  3. Step 3: Cross multiply
    418,634.60x = 577,730.95 × 239,821.16
  4. Step 4: Simplify right side
    418,634.60x = 138,552,103,108.69
  5. Step 5: Solve for x
    x = 138,552,103,108.69/418,634.60
  6. Step 6: Final answer
    x = 330,961.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.