Home / 672,000.40-1,008,000.60-388,565.20

Finding the Fourth Proportional to 672,000.40, 1,008,000.60 and 388,565.20

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Solution

The fourth proportional to 672,000.40, 1,008,000.60 and 388,565.20 is: 582,847.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,000.40 : 1,008,000.60 = 388,565.20 : x
  2. Step 2: Convert to fraction form
    672,000.40/1,008,000.60 = 388,565.20/x
  3. Step 3: Cross multiply
    672,000.40x = 1,008,000.60 × 388,565.20
  4. Step 4: Simplify right side
    672,000.40x = 391,673,954,739.12
  5. Step 5: Solve for x
    x = 391,673,954,739.12/672,000.40
  6. Step 6: Final answer
    x = 582,847.80

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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.