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Finding the Fourth Proportional to 1,400.15, 1,932.64 and 902.79

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Solution

The fourth proportional to 1,400.15, 1,932.64 and 902.79 is: 1,246.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.15 : 1,932.64 = 902.79 : x
  2. Step 2: Convert to fraction form
    1,400.15/1,932.64 = 902.79/x
  3. Step 3: Cross multiply
    1,400.15x = 1,932.64 × 902.79
  4. Step 4: Simplify right side
    1,400.15x = 1,744,765.81
  5. Step 5: Solve for x
    x = 1,744,765.81/1,400.15
  6. Step 6: Final answer
    x = 1,246.13

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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.