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Finding the Fourth Proportional to 373.64, 514.86 and 257

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Solution

The fourth proportional to 373.64, 514.86 and 257 is: 354.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.64 : 514.86 = 257 : x
  2. Step 2: Convert to fraction form
    373.64/514.86 = 257/x
  3. Step 3: Cross multiply
    373.64x = 514.86 × 257
  4. Step 4: Simplify right side
    373.64x = 132,319.02
  5. Step 5: Solve for x
    x = 132,319.02/373.64
  6. Step 6: Final answer
    x = 354.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.