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Finding the Fourth Proportional to 1,402.90, 2,104.29 and 670.24

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Solution

The fourth proportional to 1,402.90, 2,104.29 and 670.24 is: 1,005.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402.90 : 2,104.29 = 670.24 : x
  2. Step 2: Convert to fraction form
    1,402.90/2,104.29 = 670.24/x
  3. Step 3: Cross multiply
    1,402.90x = 2,104.29 × 670.24
  4. Step 4: Simplify right side
    1,402.90x = 1,410,379.33
  5. Step 5: Solve for x
    x = 1,410,379.33/1,402.90
  6. Step 6: Final answer
    x = 1,005.33

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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.