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Finding the Fourth Proportional to 717,397.85, 990,053.80 and 395,107.86

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Solution

The fourth proportional to 717,397.85, 990,053.80 and 395,107.86 is: 545,273.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,397.85 : 990,053.80 = 395,107.86 : x
  2. Step 2: Convert to fraction form
    717,397.85/990,053.80 = 395,107.86/x
  3. Step 3: Cross multiply
    717,397.85x = 990,053.80 × 395,107.86
  4. Step 4: Simplify right side
    717,397.85x = 391,178,038,202.87
  5. Step 5: Solve for x
    x = 391,178,038,202.87/717,397.85
  6. Step 6: Final answer
    x = 545,273.51

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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.