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Finding the Fourth Proportional to 439,617.80, 659,426.70 and 392,961.80

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Solution

The fourth proportional to 439,617.80, 659,426.70 and 392,961.80 is: 589,442.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,617.80 : 659,426.70 = 392,961.80 : x
  2. Step 2: Convert to fraction form
    439,617.80/659,426.70 = 392,961.80/x
  3. Step 3: Cross multiply
    439,617.80x = 659,426.70 × 392,961.80
  4. Step 4: Simplify right side
    439,617.80x = 259,129,503,000.06
  5. Step 5: Solve for x
    x = 259,129,503,000.06/439,617.80
  6. Step 6: Final answer
    x = 589,442.70

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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.