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Finding the Fourth Proportional to 1,931,724.88, 2,896,406.32 and 921,155.92

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Solution

The fourth proportional to 1,931,724.88, 2,896,406.32 and 921,155.92 is: 1,381,170.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,931,724.88 : 2,896,406.32 = 921,155.92 : x
  2. Step 2: Convert to fraction form
    1,931,724.88/2,896,406.32 = 921,155.92/x
  3. Step 3: Cross multiply
    1,931,724.88x = 2,896,406.32 × 921,155.92
  4. Step 4: Simplify right side
    1,931,724.88x = 2,668,041,828,393.41
  5. Step 5: Solve for x
    x = 2,668,041,828,393.41/1,931,724.88
  6. Step 6: Final answer
    x = 1,381,170.71

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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.