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Finding the Fourth Proportional to 888.51, 1,226.30 and 515.45

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Solution

The fourth proportional to 888.51, 1,226.30 and 515.45 is: 711.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.51 : 1,226.30 = 515.45 : x
  2. Step 2: Convert to fraction form
    888.51/1,226.30 = 515.45/x
  3. Step 3: Cross multiply
    888.51x = 1,226.30 × 515.45
  4. Step 4: Simplify right side
    888.51x = 632,096.34
  5. Step 5: Solve for x
    x = 632,096.34/888.51
  6. Step 6: Final answer
    x = 711.41

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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.