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Finding the Fourth Proportional to 260,872.65, 390,714.84 and 155,473.83

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Solution

The fourth proportional to 260,872.65, 390,714.84 and 155,473.83 is: 232,856.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,872.65 : 390,714.84 = 155,473.83 : x
  2. Step 2: Convert to fraction form
    260,872.65/390,714.84 = 155,473.83/x
  3. Step 3: Cross multiply
    260,872.65x = 390,714.84 × 155,473.83
  4. Step 4: Simplify right side
    260,872.65x = 60,745,932,612.64
  5. Step 5: Solve for x
    x = 60,745,932,612.64/260,872.65
  6. Step 6: Final answer
    x = 232,856.65

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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.