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Finding the Fourth Proportional to 717,957.61, 990,781.52 and 395,667.72

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Solution

The fourth proportional to 717,957.61, 990,781.52 and 395,667.72 is: 546,021.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,957.61 : 990,781.52 = 395,667.72 : x
  2. Step 2: Convert to fraction form
    717,957.61/990,781.52 = 395,667.72/x
  3. Step 3: Cross multiply
    717,957.61x = 990,781.52 × 395,667.72
  4. Step 4: Simplify right side
    717,957.61x = 392,020,263,058.20
  5. Step 5: Solve for x
    x = 392,020,263,058.20/717,957.61
  6. Step 6: Final answer
    x = 546,021.46

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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.