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Finding the Fourth Proportional to 993.52, 1,490.55 and 627.81

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Solution

The fourth proportional to 993.52, 1,490.55 and 627.81 is: 941.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    993.52 : 1,490.55 = 627.81 : x
  2. Step 2: Convert to fraction form
    993.52/1,490.55 = 627.81/x
  3. Step 3: Cross multiply
    993.52x = 1,490.55 × 627.81
  4. Step 4: Simplify right side
    993.52x = 935,782.20
  5. Step 5: Solve for x
    x = 935,782.20/993.52
  6. Step 6: Final answer
    x = 941.89

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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.