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Finding the Fourth Proportional to 999.60, 1,499.76 and 451.37

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Solution

The fourth proportional to 999.60, 1,499.76 and 451.37 is: 677.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.60 : 1,499.76 = 451.37 : x
  2. Step 2: Convert to fraction form
    999.60/1,499.76 = 451.37/x
  3. Step 3: Cross multiply
    999.60x = 1,499.76 × 451.37
  4. Step 4: Simplify right side
    999.60x = 676,939.17
  5. Step 5: Solve for x
    x = 676,939.17/999.60
  6. Step 6: Final answer
    x = 677.21

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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.