Home / 858,785.55-1,288,178.33-499,570.80

Finding the Fourth Proportional to 858,785.55, 1,288,178.33 and 499,570.80

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Solution

The fourth proportional to 858,785.55, 1,288,178.33 and 499,570.80 is: 749,356.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,785.55 : 1,288,178.33 = 499,570.80 : x
  2. Step 2: Convert to fraction form
    858,785.55/1,288,178.33 = 499,570.80/x
  3. Step 3: Cross multiply
    858,785.55x = 1,288,178.33 × 499,570.80
  4. Step 4: Simplify right side
    858,785.55x = 643,536,276,362.91
  5. Step 5: Solve for x
    x = 643,536,276,362.91/858,785.55
  6. Step 6: Final answer
    x = 749,356.20

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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.