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Finding the Fourth Proportional to 983.46, 1,357.30 and 635.16

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Solution

The fourth proportional to 983.46, 1,357.30 and 635.16 is: 876.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.46 : 1,357.30 = 635.16 : x
  2. Step 2: Convert to fraction form
    983.46/1,357.30 = 635.16/x
  3. Step 3: Cross multiply
    983.46x = 1,357.30 × 635.16
  4. Step 4: Simplify right side
    983.46x = 862,095.88
  5. Step 5: Solve for x
    x = 862,095.88/983.46
  6. Step 6: Final answer
    x = 876.60

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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.