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Finding the Fourth Proportional to 1,394.80, 2,091.51 and 529.18

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Solution

The fourth proportional to 1,394.80, 2,091.51 and 529.18 is: 793.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.80 : 2,091.51 = 529.18 : x
  2. Step 2: Convert to fraction form
    1,394.80/2,091.51 = 529.18/x
  3. Step 3: Cross multiply
    1,394.80x = 2,091.51 × 529.18
  4. Step 4: Simplify right side
    1,394.80x = 1,106,785.26
  5. Step 5: Solve for x
    x = 1,106,785.26/1,394.80
  6. Step 6: Final answer
    x = 793.51

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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.