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Finding the Fourth Proportional to 420,679.36, 580,545.60 and 229,700.32

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Solution

The fourth proportional to 420,679.36, 580,545.60 and 229,700.32 is: 316,990.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,679.36 : 580,545.60 = 229,700.32 : x
  2. Step 2: Convert to fraction form
    420,679.36/580,545.60 = 229,700.32/x
  3. Step 3: Cross multiply
    420,679.36x = 580,545.60 × 229,700.32
  4. Step 4: Simplify right side
    420,679.36x = 133,351,510,094.59
  5. Step 5: Solve for x
    x = 133,351,510,094.59/420,679.36
  6. Step 6: Final answer
    x = 316,990.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.