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Finding the Fourth Proportional to 1,076, 1,621.32 and 958.12

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Solution

The fourth proportional to 1,076, 1,621.32 and 958.12 is: 1,443.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076 : 1,621.32 = 958.12 : x
  2. Step 2: Convert to fraction form
    1,076/1,621.32 = 958.12/x
  3. Step 3: Cross multiply
    1,076x = 1,621.32 × 958.12
  4. Step 4: Simplify right side
    1,076x = 1,553,419.12
  5. Step 5: Solve for x
    x = 1,553,419.12/1,076
  6. Step 6: Final answer
    x = 1,443.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.