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Finding the Fourth Proportional to 1,040.43, 1,560.72 and 310.01

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Solution

The fourth proportional to 1,040.43, 1,560.72 and 310.01 is: 465.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.43 : 1,560.72 = 310.01 : x
  2. Step 2: Convert to fraction form
    1,040.43/1,560.72 = 310.01/x
  3. Step 3: Cross multiply
    1,040.43x = 1,560.72 × 310.01
  4. Step 4: Simplify right side
    1,040.43x = 483,839.20
  5. Step 5: Solve for x
    x = 483,839.20/1,040.43
  6. Step 6: Final answer
    x = 465.04

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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.