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Finding the Fourth Proportional to 668.95, 1,001.80 and 379.51

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Solution

The fourth proportional to 668.95, 1,001.80 and 379.51 is: 568.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.95 : 1,001.80 = 379.51 : x
  2. Step 2: Convert to fraction form
    668.95/1,001.80 = 379.51/x
  3. Step 3: Cross multiply
    668.95x = 1,001.80 × 379.51
  4. Step 4: Simplify right side
    668.95x = 380,193.12
  5. Step 5: Solve for x
    x = 380,193.12/668.95
  6. Step 6: Final answer
    x = 568.34

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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.