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Finding the Fourth Proportional to 1,402.51, 1,934.79 and 904.90

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Solution

The fourth proportional to 1,402.51, 1,934.79 and 904.90 is: 1,248.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402.51 : 1,934.79 = 904.90 : x
  2. Step 2: Convert to fraction form
    1,402.51/1,934.79 = 904.90/x
  3. Step 3: Cross multiply
    1,402.51x = 1,934.79 × 904.90
  4. Step 4: Simplify right side
    1,402.51x = 1,750,791.47
  5. Step 5: Solve for x
    x = 1,750,791.47/1,402.51
  6. Step 6: Final answer
    x = 1,248.33

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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.