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Finding the Fourth Proportional to 717,959.79, 990,791.06 and 395,681.58

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Solution

The fourth proportional to 717,959.79, 990,791.06 and 395,681.58 is: 546,044.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,959.79 : 990,791.06 = 395,681.58 : x
  2. Step 2: Convert to fraction form
    717,959.79/990,791.06 = 395,681.58/x
  3. Step 3: Cross multiply
    717,959.79x = 990,791.06 × 395,681.58
  4. Step 4: Simplify right side
    717,959.79x = 392,037,770,092.27
  5. Step 5: Solve for x
    x = 392,037,770,092.27/717,959.79
  6. Step 6: Final answer
    x = 546,044.19

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1.5x scale

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.