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Finding the Fourth Proportional to 1,000, 1,382.88 and 954.16

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Solution

The fourth proportional to 1,000, 1,382.88 and 954.16 is: 1,319.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000 : 1,382.88 = 954.16 : x
  2. Step 2: Convert to fraction form
    1,000/1,382.88 = 954.16/x
  3. Step 3: Cross multiply
    1,000x = 1,382.88 × 954.16
  4. Step 4: Simplify right side
    1,000x = 1,319,488.78
  5. Step 5: Solve for x
    x = 1,319,488.78/1,000
  6. Step 6: Final answer
    x = 1,319.49

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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.