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Finding the Fourth Proportional to 1,402.85, 2,102.90 and 672.93

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Solution

The fourth proportional to 1,402.85, 2,102.90 and 672.93 is: 1,008.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402.85 : 2,102.90 = 672.93 : x
  2. Step 2: Convert to fraction form
    1,402.85/2,102.90 = 672.93/x
  3. Step 3: Cross multiply
    1,402.85x = 2,102.90 × 672.93
  4. Step 4: Simplify right side
    1,402.85x = 1,415,101.13
  5. Step 5: Solve for x
    x = 1,415,101.13/1,402.85
  6. Step 6: Final answer
    x = 1,008.73

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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.