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Finding the Fourth Proportional to 717,397.88, 990,053.84 and 395,107.89

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Solution

The fourth proportional to 717,397.88, 990,053.84 and 395,107.89 is: 545,273.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,397.88 : 990,053.84 = 395,107.89 : x
  2. Step 2: Convert to fraction form
    717,397.88/990,053.84 = 395,107.89/x
  3. Step 3: Cross multiply
    717,397.88x = 990,053.84 × 395,107.89
  4. Step 4: Simplify right side
    717,397.88x = 391,178,083,708.80
  5. Step 5: Solve for x
    x = 391,178,083,708.80/717,397.88
  6. Step 6: Final answer
    x = 545,273.54

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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.