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Finding the Fourth Proportional to 888.79, 1,332.93 and 426.12

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Solution

The fourth proportional to 888.79, 1,332.93 and 426.12 is: 639.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.79 : 1,332.93 = 426.12 : x
  2. Step 2: Convert to fraction form
    888.79/1,332.93 = 426.12/x
  3. Step 3: Cross multiply
    888.79x = 1,332.93 × 426.12
  4. Step 4: Simplify right side
    888.79x = 567,988.13
  5. Step 5: Solve for x
    x = 567,988.13/888.79
  6. Step 6: Final answer
    x = 639.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.