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Finding the Fourth Proportional to 993.92, 1,490.88 and 377.91

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Solution

The fourth proportional to 993.92, 1,490.88 and 377.91 is: 566.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.92 : 1,490.88 = 377.91 : x
  2. Step 2: Convert to fraction form
    993.92/1,490.88 = 377.91/x
  3. Step 3: Cross multiply
    993.92x = 1,490.88 × 377.91
  4. Step 4: Simplify right side
    993.92x = 563,418.46
  5. Step 5: Solve for x
    x = 563,418.46/993.92
  6. Step 6: Final answer
    x = 566.87

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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.