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Finding the Fourth Proportional to 717,248.49, 989,809.37 and 394,959.88

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Solution

The fourth proportional to 717,248.49, 989,809.37 and 394,959.88 is: 545,048.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,248.49 : 989,809.37 = 394,959.88 : x
  2. Step 2: Convert to fraction form
    717,248.49/989,809.37 = 394,959.88/x
  3. Step 3: Cross multiply
    717,248.49x = 989,809.37 × 394,959.88
  4. Step 4: Simplify right side
    717,248.49x = 390,934,989,998.08
  5. Step 5: Solve for x
    x = 390,934,989,998.08/717,248.49
  6. Step 6: Final answer
    x = 545,048.19

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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.