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Finding the Fourth Proportional to 1,928,375.81, 2,891,479.40 and 790,824.77

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Solution

The fourth proportional to 1,928,375.81, 2,891,479.40 and 790,824.77 is: 1,185,792.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928,375.81 : 2,891,479.40 = 790,824.77 : x
  2. Step 2: Convert to fraction form
    1,928,375.81/2,891,479.40 = 790,824.77/x
  3. Step 3: Cross multiply
    1,928,375.81x = 2,891,479.40 × 790,824.77
  4. Step 4: Simplify right side
    1,928,375.81x = 2,286,653,527,510.61
  5. Step 5: Solve for x
    x = 2,286,653,527,510.61/1,928,375.81
  6. Step 6: Final answer
    x = 1,185,792.48

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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.