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Finding the Fourth Proportional to 615.56, 847.53 and 522.11

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Solution

The fourth proportional to 615.56, 847.53 and 522.11 is: 718.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.56 : 847.53 = 522.11 : x
  2. Step 2: Convert to fraction form
    615.56/847.53 = 522.11/x
  3. Step 3: Cross multiply
    615.56x = 847.53 × 522.11
  4. Step 4: Simplify right side
    615.56x = 442,503.89
  5. Step 5: Solve for x
    x = 442,503.89/615.56
  6. Step 6: Final answer
    x = 718.86

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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.