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Finding the Fourth Proportional to 1,003.04, 1,504.72 and 319.04

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Solution

The fourth proportional to 1,003.04, 1,504.72 and 319.04 is: 478.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.04 : 1,504.72 = 319.04 : x
  2. Step 2: Convert to fraction form
    1,003.04/1,504.72 = 319.04/x
  3. Step 3: Cross multiply
    1,003.04x = 1,504.72 × 319.04
  4. Step 4: Simplify right side
    1,003.04x = 480,065.87
  5. Step 5: Solve for x
    x = 480,065.87/1,003.04
  6. Step 6: Final answer
    x = 478.61

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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.