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Finding the Fourth Proportional to 1,173.14, 1,614.32 and 958.55

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Solution

The fourth proportional to 1,173.14, 1,614.32 and 958.55 is: 1,319.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.14 : 1,614.32 = 958.55 : x
  2. Step 2: Convert to fraction form
    1,173.14/1,614.32 = 958.55/x
  3. Step 3: Cross multiply
    1,173.14x = 1,614.32 × 958.55
  4. Step 4: Simplify right side
    1,173.14x = 1,547,393.57
  5. Step 5: Solve for x
    x = 1,547,393.57/1,173.14
  6. Step 6: Final answer
    x = 1,319.02

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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.