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Finding the Fourth Proportional to 609.66, 912.60 and 522.18

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Solution

The fourth proportional to 609.66, 912.60 and 522.18 is: 781.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.66 : 912.60 = 522.18 : x
  2. Step 2: Convert to fraction form
    609.66/912.60 = 522.18/x
  3. Step 3: Cross multiply
    609.66x = 912.60 × 522.18
  4. Step 4: Simplify right side
    609.66x = 476,541.47
  5. Step 5: Solve for x
    x = 476,541.47/609.66
  6. Step 6: Final answer
    x = 781.65

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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.