Home / 479,986.20-719,979.30-472,987.80

Finding the Fourth Proportional to 479,986.20, 719,979.30 and 472,987.80

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Solution

The fourth proportional to 479,986.20, 719,979.30 and 472,987.80 is: 709,481.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,986.20 : 719,979.30 = 472,987.80 : x
  2. Step 2: Convert to fraction form
    479,986.20/719,979.30 = 472,987.80/x
  3. Step 3: Cross multiply
    479,986.20x = 719,979.30 × 472,987.80
  4. Step 4: Simplify right side
    479,986.20x = 340,541,425,152.54
  5. Step 5: Solve for x
    x = 340,541,425,152.54/479,986.20
  6. Step 6: Final answer
    x = 709,481.70

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Double scale
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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.