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Finding the Fourth Proportional to 992.03, 1,488.55 and 505.08

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Solution

The fourth proportional to 992.03, 1,488.55 and 505.08 is: 757.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.03 : 1,488.55 = 505.08 : x
  2. Step 2: Convert to fraction form
    992.03/1,488.55 = 505.08/x
  3. Step 3: Cross multiply
    992.03x = 1,488.55 × 505.08
  4. Step 4: Simplify right side
    992.03x = 751,836.83
  5. Step 5: Solve for x
    x = 751,836.83/992.03
  6. Step 6: Final answer
    x = 757.88

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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.