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Finding the Fourth Proportional to 612.98, 918.27 and 547.71

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Solution

The fourth proportional to 612.98, 918.27 and 547.71 is: 820.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.98 : 918.27 = 547.71 : x
  2. Step 2: Convert to fraction form
    612.98/918.27 = 547.71/x
  3. Step 3: Cross multiply
    612.98x = 918.27 × 547.71
  4. Step 4: Simplify right side
    612.98x = 502,938.33
  5. Step 5: Solve for x
    x = 502,938.33/612.98
  6. Step 6: Final answer
    x = 820.49

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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.