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Finding the Fourth Proportional to 612.55, 913.96 and 531.55

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Solution

The fourth proportional to 612.55, 913.96 and 531.55 is: 793.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.55 : 913.96 = 531.55 : x
  2. Step 2: Convert to fraction form
    612.55/913.96 = 531.55/x
  3. Step 3: Cross multiply
    612.55x = 913.96 × 531.55
  4. Step 4: Simplify right side
    612.55x = 485,815.44
  5. Step 5: Solve for x
    x = 485,815.44/612.55
  6. Step 6: Final answer
    x = 793.10

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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.