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Finding the Fourth Proportional to 615.10, 922.65 and 564.70

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Solution

The fourth proportional to 615.10, 922.65 and 564.70 is: 847.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.10 : 922.65 = 564.70 : x
  2. Step 2: Convert to fraction form
    615.10/922.65 = 564.70/x
  3. Step 3: Cross multiply
    615.10x = 922.65 × 564.70
  4. Step 4: Simplify right side
    615.10x = 521,020.46
  5. Step 5: Solve for x
    x = 521,020.46/615.10
  6. Step 6: Final answer
    x = 847.05

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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.