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Finding the Fourth Proportional to 1,373.91, 1,895.47 and 876.43

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Solution

The fourth proportional to 1,373.91, 1,895.47 and 876.43 is: 1,209.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,373.91 : 1,895.47 = 876.43 : x
  2. Step 2: Convert to fraction form
    1,373.91/1,895.47 = 876.43/x
  3. Step 3: Cross multiply
    1,373.91x = 1,895.47 × 876.43
  4. Step 4: Simplify right side
    1,373.91x = 1,661,246.77
  5. Step 5: Solve for x
    x = 1,661,246.77/1,373.91
  6. Step 6: Final answer
    x = 1,209.14

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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.