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Finding the Fourth Proportional to 1,402.26, 1,934.44 and 904.65

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Solution

The fourth proportional to 1,402.26, 1,934.44 and 904.65 is: 1,247.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402.26 : 1,934.44 = 904.65 : x
  2. Step 2: Convert to fraction form
    1,402.26/1,934.44 = 904.65/x
  3. Step 3: Cross multiply
    1,402.26x = 1,934.44 × 904.65
  4. Step 4: Simplify right side
    1,402.26x = 1,749,991.15
  5. Step 5: Solve for x
    x = 1,749,991.15/1,402.26
  6. Step 6: Final answer
    x = 1,247.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.