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Finding the Fourth Proportional to 420,641.34, 580,482.05 and 229,654.73

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Solution

The fourth proportional to 420,641.34, 580,482.05 and 229,654.73 is: 316,921.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,641.34 : 580,482.05 = 229,654.73 : x
  2. Step 2: Convert to fraction form
    420,641.34/580,482.05 = 229,654.73/x
  3. Step 3: Cross multiply
    420,641.34x = 580,482.05 × 229,654.73
  4. Step 4: Simplify right side
    420,641.34x = 133,310,444,411.91
  5. Step 5: Solve for x
    x = 133,310,444,411.91/420,641.34
  6. Step 6: Final answer
    x = 316,921.88

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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.