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Finding the Fourth Proportional to 615.56, 846.57 and 489.74

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Solution

The fourth proportional to 615.56, 846.57 and 489.74 is: 673.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.56 : 846.57 = 489.74 : x
  2. Step 2: Convert to fraction form
    615.56/846.57 = 489.74/x
  3. Step 3: Cross multiply
    615.56x = 846.57 × 489.74
  4. Step 4: Simplify right side
    615.56x = 414,599.19
  5. Step 5: Solve for x
    x = 414,599.19/615.56
  6. Step 6: Final answer
    x = 673.53

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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.