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Finding the Fourth Proportional to 515.55, 773.13 and 207.34

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Solution

The fourth proportional to 515.55, 773.13 and 207.34 is: 310.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.55 : 773.13 = 207.34 : x
  2. Step 2: Convert to fraction form
    515.55/773.13 = 207.34/x
  3. Step 3: Cross multiply
    515.55x = 773.13 × 207.34
  4. Step 4: Simplify right side
    515.55x = 160,300.77
  5. Step 5: Solve for x
    x = 160,300.77/515.55
  6. Step 6: Final answer
    x = 310.93

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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.