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Finding the Fourth Proportional to 983.60, 1,353.16 and 956.27

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Solution

The fourth proportional to 983.60, 1,353.16 and 956.27 is: 1,315.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.60 : 1,353.16 = 956.27 : x
  2. Step 2: Convert to fraction form
    983.60/1,353.16 = 956.27/x
  3. Step 3: Cross multiply
    983.60x = 1,353.16 × 956.27
  4. Step 4: Simplify right side
    983.60x = 1,293,986.31
  5. Step 5: Solve for x
    x = 1,293,986.31/983.60
  6. Step 6: Final answer
    x = 1,315.56

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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.