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Finding the Fourth Proportional to 439,728.60, 659,139.30 and 239,626.20

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Solution

The fourth proportional to 439,728.60, 659,139.30 and 239,626.20 is: 359,192.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,728.60 : 659,139.30 = 239,626.20 : x
  2. Step 2: Convert to fraction form
    439,728.60/659,139.30 = 239,626.20/x
  3. Step 3: Cross multiply
    439,728.60x = 659,139.30 × 239,626.20
  4. Step 4: Simplify right side
    439,728.60x = 157,947,045,729.66
  5. Step 5: Solve for x
    x = 157,947,045,729.66/439,728.60
  6. Step 6: Final answer
    x = 359,192.11

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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.