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Finding the Fourth Proportional to 504,156.80, 756,235.20 and 428,049.20

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Solution

The fourth proportional to 504,156.80, 756,235.20 and 428,049.20 is: 642,073.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    504,156.80 : 756,235.20 = 428,049.20 : x
  2. Step 2: Convert to fraction form
    504,156.80/756,235.20 = 428,049.20/x
  3. Step 3: Cross multiply
    504,156.80x = 756,235.20 × 428,049.20
  4. Step 4: Simplify right side
    504,156.80x = 323,705,872,371.84
  5. Step 5: Solve for x
    x = 323,705,872,371.84/504,156.80
  6. Step 6: Final answer
    x = 642,073.80

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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.