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Finding the Fourth Proportional to 644, 888.30 and 423.14

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Solution

The fourth proportional to 644, 888.30 and 423.14 is: 583.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    644 : 888.30 = 423.14 : x
  2. Step 2: Convert to fraction form
    644/888.30 = 423.14/x
  3. Step 3: Cross multiply
    644x = 888.30 × 423.14
  4. Step 4: Simplify right side
    644x = 375,875.26
  5. Step 5: Solve for x
    x = 375,875.26/644
  6. Step 6: Final answer
    x = 583.66

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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.