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Finding the Fourth Proportional to 612.66, 918.11 and 539.36

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Solution

The fourth proportional to 612.66, 918.11 and 539.36 is: 808.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.66 : 918.11 = 539.36 : x
  2. Step 2: Convert to fraction form
    612.66/918.11 = 539.36/x
  3. Step 3: Cross multiply
    612.66x = 918.11 × 539.36
  4. Step 4: Simplify right side
    612.66x = 495,188.57
  5. Step 5: Solve for x
    x = 495,188.57/612.66
  6. Step 6: Final answer
    x = 808.26

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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.