Home / 672,280.20-1,008,420.30-388,456.20

Finding the Fourth Proportional to 672,280.20, 1,008,420.30 and 388,456.20

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Solution

The fourth proportional to 672,280.20, 1,008,420.30 and 388,456.20 is: 582,684.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,280.20 : 1,008,420.30 = 388,456.20 : x
  2. Step 2: Convert to fraction form
    672,280.20/1,008,420.30 = 388,456.20/x
  3. Step 3: Cross multiply
    672,280.20x = 1,008,420.30 × 388,456.20
  4. Step 4: Simplify right side
    672,280.20x = 391,727,117,740.86
  5. Step 5: Solve for x
    x = 391,727,117,740.86/672,280.20
  6. Step 6: Final answer
    x = 582,684.30

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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.