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Finding the Fourth Proportional to 574.72, 860.66 and 548.40

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Solution

The fourth proportional to 574.72, 860.66 and 548.40 is: 821.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.72 : 860.66 = 548.40 : x
  2. Step 2: Convert to fraction form
    574.72/860.66 = 548.40/x
  3. Step 3: Cross multiply
    574.72x = 860.66 × 548.40
  4. Step 4: Simplify right side
    574.72x = 471,985.94
  5. Step 5: Solve for x
    x = 471,985.94/574.72
  6. Step 6: Final answer
    x = 821.25

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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.