Home / 858,350.10-1,287,525.15-259,403.70

Finding the Fourth Proportional to 858,350.10, 1,287,525.15 and 259,403.70

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Solution

The fourth proportional to 858,350.10, 1,287,525.15 and 259,403.70 is: 389,105.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,350.10 : 1,287,525.15 = 259,403.70 : x
  2. Step 2: Convert to fraction form
    858,350.10/1,287,525.15 = 259,403.70/x
  3. Step 3: Cross multiply
    858,350.10x = 1,287,525.15 × 259,403.70
  4. Step 4: Simplify right side
    858,350.10x = 333,988,787,753.06
  5. Step 5: Solve for x
    x = 333,988,787,753.06/858,350.10
  6. Step 6: Final answer
    x = 389,105.55

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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.