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Finding the Fourth Proportional to 999.49, 1,499.24 and 306.16

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Solution

The fourth proportional to 999.49, 1,499.24 and 306.16 is: 459.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.49 : 1,499.24 = 306.16 : x
  2. Step 2: Convert to fraction form
    999.49/1,499.24 = 306.16/x
  3. Step 3: Cross multiply
    999.49x = 1,499.24 × 306.16
  4. Step 4: Simplify right side
    999.49x = 459,005.79
  5. Step 5: Solve for x
    x = 459,005.79/999.49
  6. Step 6: Final answer
    x = 459.24

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1.5x scale

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.