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Finding the Fourth Proportional to 717,400.85, 990,057.94 and 395,110.86

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Solution

The fourth proportional to 717,400.85, 990,057.94 and 395,110.86 is: 545,277.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,400.85 : 990,057.94 = 395,110.86 : x
  2. Step 2: Convert to fraction form
    717,400.85/990,057.94 = 395,110.86/x
  3. Step 3: Cross multiply
    717,400.85x = 990,057.94 × 395,110.86
  4. Step 4: Simplify right side
    717,400.85x = 391,182,644,123.23
  5. Step 5: Solve for x
    x = 391,182,644,123.23/717,400.85
  6. Step 6: Final answer
    x = 545,277.64

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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.