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Finding the Fourth Proportional to 571.54, 787.35 and 543.74

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Solution

The fourth proportional to 571.54, 787.35 and 543.74 is: 749.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.54 : 787.35 = 543.74 : x
  2. Step 2: Convert to fraction form
    571.54/787.35 = 543.74/x
  3. Step 3: Cross multiply
    571.54x = 787.35 × 543.74
  4. Step 4: Simplify right side
    571.54x = 428,113.69
  5. Step 5: Solve for x
    x = 428,113.69/571.54
  6. Step 6: Final answer
    x = 749.06

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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.