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Finding the Fourth Proportional to 707,807.43, 1,061,708.72 and 287,082.09

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Solution

The fourth proportional to 707,807.43, 1,061,708.72 and 287,082.09 is: 430,622.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,807.43 : 1,061,708.72 = 287,082.09 : x
  2. Step 2: Convert to fraction form
    707,807.43/1,061,708.72 = 287,082.09/x
  3. Step 3: Cross multiply
    707,807.43x = 1,061,708.72 × 287,082.09
  4. Step 4: Simplify right side
    707,807.43x = 304,797,556,873.41
  5. Step 5: Solve for x
    x = 304,797,556,873.41/707,807.43
  6. Step 6: Final answer
    x = 430,622.15

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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.