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Finding the Fourth Proportional to 476.82, 715.32 and 147.75

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Solution

The fourth proportional to 476.82, 715.32 and 147.75 is: 221.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.82 : 715.32 = 147.75 : x
  2. Step 2: Convert to fraction form
    476.82/715.32 = 147.75/x
  3. Step 3: Cross multiply
    476.82x = 715.32 × 147.75
  4. Step 4: Simplify right side
    476.82x = 105,688.53
  5. Step 5: Solve for x
    x = 105,688.53/476.82
  6. Step 6: Final answer
    x = 221.65

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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.