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Finding the Fourth Proportional to 717,955.56, 990,766.50 and 395,658.78

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Solution

The fourth proportional to 717,955.56, 990,766.50 and 395,658.78 is: 546,002.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,955.56 : 990,766.50 = 395,658.78 : x
  2. Step 2: Convert to fraction form
    717,955.56/990,766.50 = 395,658.78/x
  3. Step 3: Cross multiply
    717,955.56x = 990,766.50 × 395,658.78
  4. Step 4: Simplify right side
    717,955.56x = 392,005,464,654.87
  5. Step 5: Solve for x
    x = 392,005,464,654.87/717,955.56
  6. Step 6: Final answer
    x = 546,002.41

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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.