Home / 858,805.20-1,288,207.80-498,606.30

Finding the Fourth Proportional to 858,805.20, 1,288,207.80 and 498,606.30

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Solution

The fourth proportional to 858,805.20, 1,288,207.80 and 498,606.30 is: 747,909.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,805.20 : 1,288,207.80 = 498,606.30 : x
  2. Step 2: Convert to fraction form
    858,805.20/1,288,207.80 = 498,606.30/x
  3. Step 3: Cross multiply
    858,805.20x = 1,288,207.80 × 498,606.30
  4. Step 4: Simplify right side
    858,805.20x = 642,308,524,789.14
  5. Step 5: Solve for x
    x = 642,308,524,789.14/858,805.20
  6. Step 6: Final answer
    x = 747,909.45

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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.