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Finding the Fourth Proportional to 620.01, 855.18 and 560.61

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Solution

The fourth proportional to 620.01, 855.18 and 560.61 is: 773.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.01 : 855.18 = 560.61 : x
  2. Step 2: Convert to fraction form
    620.01/855.18 = 560.61/x
  3. Step 3: Cross multiply
    620.01x = 855.18 × 560.61
  4. Step 4: Simplify right side
    620.01x = 479,422.46
  5. Step 5: Solve for x
    x = 479,422.46/620.01
  6. Step 6: Final answer
    x = 773.25

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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.