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Finding the Fourth Proportional to 992.46, 1,489.20 and 473.05

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Solution

The fourth proportional to 992.46, 1,489.20 and 473.05 is: 709.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.46 : 1,489.20 = 473.05 : x
  2. Step 2: Convert to fraction form
    992.46/1,489.20 = 473.05/x
  3. Step 3: Cross multiply
    992.46x = 1,489.20 × 473.05
  4. Step 4: Simplify right side
    992.46x = 704,466.06
  5. Step 5: Solve for x
    x = 704,466.06/992.46
  6. Step 6: Final answer
    x = 709.82

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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.