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Finding the Fourth Proportional to 667.40, 1,001.10 and 277.12

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Solution

The fourth proportional to 667.40, 1,001.10 and 277.12 is: 415.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.40 : 1,001.10 = 277.12 : x
  2. Step 2: Convert to fraction form
    667.40/1,001.10 = 277.12/x
  3. Step 3: Cross multiply
    667.40x = 1,001.10 × 277.12
  4. Step 4: Simplify right side
    667.40x = 277,424.83
  5. Step 5: Solve for x
    x = 277,424.83/667.40
  6. Step 6: Final answer
    x = 415.68

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Double scale
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1.5x scale

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.