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Finding the Fourth Proportional to 620.50, 931.86 and 605.92

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Solution

The fourth proportional to 620.50, 931.86 and 605.92 is: 909.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.50 : 931.86 = 605.92 : x
  2. Step 2: Convert to fraction form
    620.50/931.86 = 605.92/x
  3. Step 3: Cross multiply
    620.50x = 931.86 × 605.92
  4. Step 4: Simplify right side
    620.50x = 564,632.61
  5. Step 5: Solve for x
    x = 564,632.61/620.50
  6. Step 6: Final answer
    x = 909.96

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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.