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Finding the Fourth Proportional to 1,931,899.92, 2,896,668.32 and 921,330.96

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Solution

The fourth proportional to 1,931,899.92, 2,896,668.32 and 921,330.96 is: 1,381,432.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931,899.92 : 2,896,668.32 = 921,330.96 : x
  2. Step 2: Convert to fraction form
    1,931,899.92/2,896,668.32 = 921,330.96/x
  3. Step 3: Cross multiply
    1,931,899.92x = 2,896,668.32 × 921,330.96
  4. Step 4: Simplify right side
    1,931,899.92x = 2,668,790,204,067.19
  5. Step 5: Solve for x
    x = 2,668,790,204,067.19/1,931,899.92
  6. Step 6: Final answer
    x = 1,381,432.95

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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.