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Finding the Fourth Proportional to 3,148.71, 4,721.87 and 926.93

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Solution

The fourth proportional to 3,148.71, 4,721.87 and 926.93 is: 1,390.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,148.71 : 4,721.87 = 926.93 : x
  2. Step 2: Convert to fraction form
    3,148.71/4,721.87 = 926.93/x
  3. Step 3: Cross multiply
    3,148.71x = 4,721.87 × 926.93
  4. Step 4: Simplify right side
    3,148.71x = 4,376,847.83
  5. Step 5: Solve for x
    x = 4,376,847.83/3,148.71
  6. Step 6: Final answer
    x = 1,390.04

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1.5x scale

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.