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Finding the Fourth Proportional to 562.23, 775.89 and 313.55

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Solution

The fourth proportional to 562.23, 775.89 and 313.55 is: 432.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.23 : 775.89 = 313.55 : x
  2. Step 2: Convert to fraction form
    562.23/775.89 = 313.55/x
  3. Step 3: Cross multiply
    562.23x = 775.89 × 313.55
  4. Step 4: Simplify right side
    562.23x = 243,276.43
  5. Step 5: Solve for x
    x = 243,276.43/562.23
  6. Step 6: Final answer
    x = 432.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.