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Finding the Fourth Proportional to 999.47, 1,499.48 and 890.53

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Solution

The fourth proportional to 999.47, 1,499.48 and 890.53 is: 1,336.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.47 : 1,499.48 = 890.53 : x
  2. Step 2: Convert to fraction form
    999.47/1,499.48 = 890.53/x
  3. Step 3: Cross multiply
    999.47x = 1,499.48 × 890.53
  4. Step 4: Simplify right side
    999.47x = 1,335,331.92
  5. Step 5: Solve for x
    x = 1,335,331.92/999.47
  6. Step 6: Final answer
    x = 1,336.04

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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.