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Finding the Fourth Proportional to 888.08, 1,225.66 and 640.22

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Solution

The fourth proportional to 888.08, 1,225.66 and 640.22 is: 883.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.08 : 1,225.66 = 640.22 : x
  2. Step 2: Convert to fraction form
    888.08/1,225.66 = 640.22/x
  3. Step 3: Cross multiply
    888.08x = 1,225.66 × 640.22
  4. Step 4: Simplify right side
    888.08x = 784,685.92
  5. Step 5: Solve for x
    x = 784,685.92/888.08
  6. Step 6: Final answer
    x = 883.58

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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.