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Finding the Fourth Proportional to 1,182.29, 1,631.08 and 715.73

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Solution

The fourth proportional to 1,182.29, 1,631.08 and 715.73 is: 987.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.29 : 1,631.08 = 715.73 : x
  2. Step 2: Convert to fraction form
    1,182.29/1,631.08 = 715.73/x
  3. Step 3: Cross multiply
    1,182.29x = 1,631.08 × 715.73
  4. Step 4: Simplify right side
    1,182.29x = 1,167,412.89
  5. Step 5: Solve for x
    x = 1,167,412.89/1,182.29
  6. Step 6: Final answer
    x = 987.42

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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.