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Finding the Fourth Proportional to 515.43, 710.57 and 357.75

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Solution

The fourth proportional to 515.43, 710.57 and 357.75 is: 493.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.43 : 710.57 = 357.75 : x
  2. Step 2: Convert to fraction form
    515.43/710.57 = 357.75/x
  3. Step 3: Cross multiply
    515.43x = 710.57 × 357.75
  4. Step 4: Simplify right side
    515.43x = 254,207.31
  5. Step 5: Solve for x
    x = 254,207.31/515.43
  6. Step 6: Final answer
    x = 493.19

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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.