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Finding the Fourth Proportional to 514.78, 709.86 and 357.59

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Solution

The fourth proportional to 514.78, 709.86 and 357.59 is: 493.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.78 : 709.86 = 357.59 : x
  2. Step 2: Convert to fraction form
    514.78/709.86 = 357.59/x
  3. Step 3: Cross multiply
    514.78x = 709.86 × 357.59
  4. Step 4: Simplify right side
    514.78x = 253,839.96
  5. Step 5: Solve for x
    x = 253,839.96/514.78
  6. Step 6: Final answer
    x = 493.10

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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.