Home / 858,416.10-1,287,624.15-259,469.70

Finding the Fourth Proportional to 858,416.10, 1,287,624.15 and 259,469.70

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Solution

The fourth proportional to 858,416.10, 1,287,624.15 and 259,469.70 is: 389,204.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,416.10 : 1,287,624.15 = 259,469.70 : x
  2. Step 2: Convert to fraction form
    858,416.10/1,287,624.15 = 259,469.70/x
  3. Step 3: Cross multiply
    858,416.10x = 1,287,624.15 × 259,469.70
  4. Step 4: Simplify right side
    858,416.10x = 334,099,451,913.26
  5. Step 5: Solve for x
    x = 334,099,451,913.26/858,416.10
  6. Step 6: Final answer
    x = 389,204.55

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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.