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Finding the Fourth Proportional to 886,863.10, 1,330,489.05 and 287,722.30

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Solution

The fourth proportional to 886,863.10, 1,330,489.05 and 287,722.30 is: 431,646.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,863.10 : 1,330,489.05 = 287,722.30 : x
  2. Step 2: Convert to fraction form
    886,863.10/1,330,489.05 = 287,722.30/x
  3. Step 3: Cross multiply
    886,863.10x = 1,330,489.05 × 287,722.30
  4. Step 4: Simplify right side
    886,863.10x = 382,811,369,590.82
  5. Step 5: Solve for x
    x = 382,811,369,590.82/886,863.10
  6. Step 6: Final answer
    x = 431,646.52

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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.