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Finding the Fourth Proportional to 1,178.29, 1,625.56 and 711.73

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Solution

The fourth proportional to 1,178.29, 1,625.56 and 711.73 is: 981.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.29 : 1,625.56 = 711.73 : x
  2. Step 2: Convert to fraction form
    1,178.29/1,625.56 = 711.73/x
  3. Step 3: Cross multiply
    1,178.29x = 1,625.56 × 711.73
  4. Step 4: Simplify right side
    1,178.29x = 1,156,959.82
  5. Step 5: Solve for x
    x = 1,156,959.82/1,178.29
  6. Step 6: Final answer
    x = 981.90

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1.5x scale

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.