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Finding the Fourth Proportional to 888.17, 1,225.43 and 515.16

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Solution

The fourth proportional to 888.17, 1,225.43 and 515.16 is: 710.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.17 : 1,225.43 = 515.16 : x
  2. Step 2: Convert to fraction form
    888.17/1,225.43 = 515.16/x
  3. Step 3: Cross multiply
    888.17x = 1,225.43 × 515.16
  4. Step 4: Simplify right side
    888.17x = 631,291.87
  5. Step 5: Solve for x
    x = 631,291.87/888.17
  6. Step 6: Final answer
    x = 710.78

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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.