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Finding the Fourth Proportional to 992.85, 1,488.93 and 444.72

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Solution

The fourth proportional to 992.85, 1,488.93 and 444.72 is: 666.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.85 : 1,488.93 = 444.72 : x
  2. Step 2: Convert to fraction form
    992.85/1,488.93 = 444.72/x
  3. Step 3: Cross multiply
    992.85x = 1,488.93 × 444.72
  4. Step 4: Simplify right side
    992.85x = 662,156.95
  5. Step 5: Solve for x
    x = 662,156.95/992.85
  6. Step 6: Final answer
    x = 666.93

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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.