Home / 858,348.60-1,287,522.90-259,402.20

Finding the Fourth Proportional to 858,348.60, 1,287,522.90 and 259,402.20

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Solution

The fourth proportional to 858,348.60, 1,287,522.90 and 259,402.20 is: 389,103.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,348.60 : 1,287,522.90 = 259,402.20 : x
  2. Step 2: Convert to fraction form
    858,348.60/1,287,522.90 = 259,402.20/x
  3. Step 3: Cross multiply
    858,348.60x = 1,287,522.90 × 259,402.20
  4. Step 4: Simplify right side
    858,348.60x = 333,986,272,810.38
  5. Step 5: Solve for x
    x = 333,986,272,810.38/858,348.60
  6. Step 6: Final answer
    x = 389,103.30

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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.