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Finding the Fourth Proportional to 858,793.65, 1,288,190.48 and 260,175.30

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Solution

The fourth proportional to 858,793.65, 1,288,190.48 and 260,175.30 is: 390,262.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,793.65 : 1,288,190.48 = 260,175.30 : x
  2. Step 2: Convert to fraction form
    858,793.65/1,288,190.48 = 260,175.30/x
  3. Step 3: Cross multiply
    858,793.65x = 1,288,190.48 × 260,175.30
  4. Step 4: Simplify right side
    858,793.65x = 335,155,343,290.27
  5. Step 5: Solve for x
    x = 335,155,343,290.27/858,793.65
  6. Step 6: Final answer
    x = 390,262.95

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.