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Finding the Fourth Proportional to 612.75, 913.72 and 568.11

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Solution

The fourth proportional to 612.75, 913.72 and 568.11 is: 847.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.75 : 913.72 = 568.11 : x
  2. Step 2: Convert to fraction form
    612.75/913.72 = 568.11/x
  3. Step 3: Cross multiply
    612.75x = 913.72 × 568.11
  4. Step 4: Simplify right side
    612.75x = 519,092.05
  5. Step 5: Solve for x
    x = 519,092.05/612.75
  6. Step 6: Final answer
    x = 847.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.