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Finding the Fourth Proportional to 717,959.86, 990,784.62 and 395,669.97

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Solution

The fourth proportional to 717,959.86, 990,784.62 and 395,669.97 is: 546,024.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,959.86 : 990,784.62 = 395,669.97 : x
  2. Step 2: Convert to fraction form
    717,959.86/990,784.62 = 395,669.97/x
  3. Step 3: Cross multiply
    717,959.86x = 990,784.62 × 395,669.97
  4. Step 4: Simplify right side
    717,959.86x = 392,023,720,871.86
  5. Step 5: Solve for x
    x = 392,023,720,871.86/717,959.86
  6. Step 6: Final answer
    x = 546,024.57

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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.