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Finding the Fourth Proportional to 317.59, 476.28 and 98.21

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Solution

The fourth proportional to 317.59, 476.28 and 98.21 is: 147.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.59 : 476.28 = 98.21 : x
  2. Step 2: Convert to fraction form
    317.59/476.28 = 98.21/x
  3. Step 3: Cross multiply
    317.59x = 476.28 × 98.21
  4. Step 4: Simplify right side
    317.59x = 46,776.65
  5. Step 5: Solve for x
    x = 46,776.65/317.59
  6. Step 6: Final answer
    x = 147.29

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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.