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Finding the Fourth Proportional to 615.81, 922.95 and 471.21

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Solution

The fourth proportional to 615.81, 922.95 and 471.21 is: 706.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.81 : 922.95 = 471.21 : x
  2. Step 2: Convert to fraction form
    615.81/922.95 = 471.21/x
  3. Step 3: Cross multiply
    615.81x = 922.95 × 471.21
  4. Step 4: Simplify right side
    615.81x = 434,903.27
  5. Step 5: Solve for x
    x = 434,903.27/615.81
  6. Step 6: Final answer
    x = 706.23

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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.