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Finding the Fourth Proportional to 571.68, 787.38 and 538.18

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Solution

The fourth proportional to 571.68, 787.38 and 538.18 is: 741.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.68 : 787.38 = 538.18 : x
  2. Step 2: Convert to fraction form
    571.68/787.38 = 538.18/x
  3. Step 3: Cross multiply
    571.68x = 787.38 × 538.18
  4. Step 4: Simplify right side
    571.68x = 423,752.17
  5. Step 5: Solve for x
    x = 423,752.17/571.68
  6. Step 6: Final answer
    x = 741.24

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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.