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Finding the Fourth Proportional to 314.26, 471.62 and 257.16

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Solution

The fourth proportional to 314.26, 471.62 and 257.16 is: 385.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.26 : 471.62 = 257.16 : x
  2. Step 2: Convert to fraction form
    314.26/471.62 = 257.16/x
  3. Step 3: Cross multiply
    314.26x = 471.62 × 257.16
  4. Step 4: Simplify right side
    314.26x = 121,281.80
  5. Step 5: Solve for x
    x = 121,281.80/314.26
  6. Step 6: Final answer
    x = 385.93

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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.