Home / 858,986.40-1,288,151.55-259,748.40

Finding the Fourth Proportional to 858,986.40, 1,288,151.55 and 259,748.40

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Solution

The fourth proportional to 858,986.40, 1,288,151.55 and 259,748.40 is: 389,523.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,986.40 : 1,288,151.55 = 259,748.40 : x
  2. Step 2: Convert to fraction form
    858,986.40/1,288,151.55 = 259,748.40/x
  3. Step 3: Cross multiply
    858,986.40x = 1,288,151.55 × 259,748.40
  4. Step 4: Simplify right side
    858,986.40x = 334,595,304,070.02
  5. Step 5: Solve for x
    x = 334,595,304,070.02/858,986.40
  6. Step 6: Final answer
    x = 389,523.40

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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.