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Finding the Fourth Proportional to 717,068.80, 989,517.38 and 394,715.94

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Solution

The fourth proportional to 717,068.80, 989,517.38 and 394,715.94 is: 544,687.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,068.80 : 989,517.38 = 394,715.94 : x
  2. Step 2: Convert to fraction form
    717,068.80/989,517.38 = 394,715.94/x
  3. Step 3: Cross multiply
    717,068.80x = 989,517.38 × 394,715.94
  4. Step 4: Simplify right side
    717,068.80x = 390,578,275,871.87
  5. Step 5: Solve for x
    x = 390,578,275,871.87/717,068.80
  6. Step 6: Final answer
    x = 544,687.31

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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.