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Finding the Fourth Proportional to 515.10, 710.45 and 357.73

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Solution

The fourth proportional to 515.10, 710.45 and 357.73 is: 493.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.10 : 710.45 = 357.73 : x
  2. Step 2: Convert to fraction form
    515.10/710.45 = 357.73/x
  3. Step 3: Cross multiply
    515.10x = 710.45 × 357.73
  4. Step 4: Simplify right side
    515.10x = 254,147.05
  5. Step 5: Solve for x
    x = 254,147.05/515.10
  6. Step 6: Final answer
    x = 493.40

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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.