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Finding the Fourth Proportional to 990.11, 1,484.69 and 502.89

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Solution

The fourth proportional to 990.11, 1,484.69 and 502.89 is: 754.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.11 : 1,484.69 = 502.89 : x
  2. Step 2: Convert to fraction form
    990.11/1,484.69 = 502.89/x
  3. Step 3: Cross multiply
    990.11x = 1,484.69 × 502.89
  4. Step 4: Simplify right side
    990.11x = 746,633.24
  5. Step 5: Solve for x
    x = 746,633.24/990.11
  6. Step 6: Final answer
    x = 754.10

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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.