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Finding the Fourth Proportional to 620.86, 927.85 and 556.62

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Solution

The fourth proportional to 620.86, 927.85 and 556.62 is: 831.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.86 : 927.85 = 556.62 : x
  2. Step 2: Convert to fraction form
    620.86/927.85 = 556.62/x
  3. Step 3: Cross multiply
    620.86x = 927.85 × 556.62
  4. Step 4: Simplify right side
    620.86x = 516,459.87
  5. Step 5: Solve for x
    x = 516,459.87/620.86
  6. Step 6: Final answer
    x = 831.85

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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.