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Finding the Fourth Proportional to 990.14, 1,484.91 and 373.53

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Solution

The fourth proportional to 990.14, 1,484.91 and 373.53 is: 560.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.14 : 1,484.91 = 373.53 : x
  2. Step 2: Convert to fraction form
    990.14/1,484.91 = 373.53/x
  3. Step 3: Cross multiply
    990.14x = 1,484.91 × 373.53
  4. Step 4: Simplify right side
    990.14x = 554,658.43
  5. Step 5: Solve for x
    x = 554,658.43/990.14
  6. Step 6: Final answer
    x = 560.18

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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.