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Finding the Fourth Proportional to 671.68, 1,006.68 and 383.28

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Solution

The fourth proportional to 671.68, 1,006.68 and 383.28 is: 574.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.68 : 1,006.68 = 383.28 : x
  2. Step 2: Convert to fraction form
    671.68/1,006.68 = 383.28/x
  3. Step 3: Cross multiply
    671.68x = 1,006.68 × 383.28
  4. Step 4: Simplify right side
    671.68x = 385,840.31
  5. Step 5: Solve for x
    x = 385,840.31/671.68
  6. Step 6: Final answer
    x = 574.44

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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.