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Finding the Fourth Proportional to 1,423.74, 2,135.19 and 902.97

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Solution

The fourth proportional to 1,423.74, 2,135.19 and 902.97 is: 1,354.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.74 : 2,135.19 = 902.97 : x
  2. Step 2: Convert to fraction form
    1,423.74/2,135.19 = 902.97/x
  3. Step 3: Cross multiply
    1,423.74x = 2,135.19 × 902.97
  4. Step 4: Simplify right side
    1,423.74x = 1,928,012.51
  5. Step 5: Solve for x
    x = 1,928,012.51/1,423.74
  6. Step 6: Final answer
    x = 1,354.19

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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.