Home / 858,380.60-1,287,570.90-259,434.20

Finding the Fourth Proportional to 858,380.60, 1,287,570.90 and 259,434.20

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Solution

The fourth proportional to 858,380.60, 1,287,570.90 and 259,434.20 is: 389,151.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,380.60 : 1,287,570.90 = 259,434.20 : x
  2. Step 2: Convert to fraction form
    858,380.60/1,287,570.90 = 259,434.20/x
  3. Step 3: Cross multiply
    858,380.60x = 1,287,570.90 × 259,434.20
  4. Step 4: Simplify right side
    858,380.60x = 334,039,926,384.78
  5. Step 5: Solve for x
    x = 334,039,926,384.78/858,380.60
  6. Step 6: Final answer
    x = 389,151.30

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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.