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Finding the Fourth Proportional to 983.83, 1,473.18 and 690.88

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Solution

The fourth proportional to 983.83, 1,473.18 and 690.88 is: 1,034.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.83 : 1,473.18 = 690.88 : x
  2. Step 2: Convert to fraction form
    983.83/1,473.18 = 690.88/x
  3. Step 3: Cross multiply
    983.83x = 1,473.18 × 690.88
  4. Step 4: Simplify right side
    983.83x = 1,017,790.60
  5. Step 5: Solve for x
    x = 1,017,790.60/983.83
  6. Step 6: Final answer
    x = 1,034.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.