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Finding the Fourth Proportional to 717,565.56, 990,195.84 and 395,257.56

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Solution

The fourth proportional to 717,565.56, 990,195.84 and 395,257.56 is: 545,430.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,565.56 : 990,195.84 = 395,257.56 : x
  2. Step 2: Convert to fraction form
    717,565.56/990,195.84 = 395,257.56/x
  3. Step 3: Cross multiply
    717,565.56x = 990,195.84 × 395,257.56
  4. Step 4: Simplify right side
    717,565.56x = 391,382,391,640.55
  5. Step 5: Solve for x
    x = 391,382,391,640.55/717,565.56
  6. Step 6: Final answer
    x = 545,430.85

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Double scale
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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.