Home / 858,785.70-1,288,178.55-498,586.80

Finding the Fourth Proportional to 858,785.70, 1,288,178.55 and 498,586.80

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Solution

The fourth proportional to 858,785.70, 1,288,178.55 and 498,586.80 is: 747,880.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,785.70 : 1,288,178.55 = 498,586.80 : x
  2. Step 2: Convert to fraction form
    858,785.70/1,288,178.55 = 498,586.80/x
  3. Step 3: Cross multiply
    858,785.70x = 1,288,178.55 × 498,586.80
  4. Step 4: Simplify right side
    858,785.70x = 642,268,821,073.14
  5. Step 5: Solve for x
    x = 642,268,821,073.14/858,785.70
  6. Step 6: Final answer
    x = 747,880.20

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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.