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Finding the Fourth Proportional to 1,294,536.72, 1,786,521.16 and 721,581.04

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Solution

The fourth proportional to 1,294,536.72, 1,786,521.16 and 721,581.04 is: 995,815.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,294,536.72 : 1,786,521.16 = 721,581.04 : x
  2. Step 2: Convert to fraction form
    1,294,536.72/1,786,521.16 = 721,581.04/x
  3. Step 3: Cross multiply
    1,294,536.72x = 1,786,521.16 × 721,581.04
  4. Step 4: Simplify right side
    1,294,536.72x = 1,289,119,796,614.81
  5. Step 5: Solve for x
    x = 1,289,119,796,614.81/1,294,536.72
  6. Step 6: Final answer
    x = 995,815.55

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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.