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Finding the Fourth Proportional to 752.13, 1,038.15 and 457.56

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Solution

The fourth proportional to 752.13, 1,038.15 and 457.56 is: 631.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    752.13 : 1,038.15 = 457.56 : x
  2. Step 2: Convert to fraction form
    752.13/1,038.15 = 457.56/x
  3. Step 3: Cross multiply
    752.13x = 1,038.15 × 457.56
  4. Step 4: Simplify right side
    752.13x = 475,015.91
  5. Step 5: Solve for x
    x = 475,015.91/752.13
  6. Step 6: Final answer
    x = 631.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.