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Finding the Fourth Proportional to 717,068.46, 989,516.91 and 394,715.60

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Solution

The fourth proportional to 717,068.46, 989,516.91 and 394,715.60 is: 544,686.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,068.46 : 989,516.91 = 394,715.60 : x
  2. Step 2: Convert to fraction form
    717,068.46/989,516.91 = 394,715.60/x
  3. Step 3: Cross multiply
    717,068.46x = 989,516.91 × 394,715.60
  4. Step 4: Simplify right side
    717,068.46x = 390,577,755,893.21
  5. Step 5: Solve for x
    x = 390,577,755,893.21/717,068.46
  6. Step 6: Final answer
    x = 544,686.84

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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.