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Finding the Fourth Proportional to 655.67, 903.94 and 515.25

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Solution

The fourth proportional to 655.67, 903.94 and 515.25 is: 710.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.67 : 903.94 = 515.25 : x
  2. Step 2: Convert to fraction form
    655.67/903.94 = 515.25/x
  3. Step 3: Cross multiply
    655.67x = 903.94 × 515.25
  4. Step 4: Simplify right side
    655.67x = 465,753.80
  5. Step 5: Solve for x
    x = 465,753.80/655.67
  6. Step 6: Final answer
    x = 710.35

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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.