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Finding the Fourth Proportional to 1,394.41, 2,091.51 and 572.46

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Solution

The fourth proportional to 1,394.41, 2,091.51 and 572.46 is: 858.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,394.41 : 2,091.51 = 572.46 : x
  2. Step 2: Convert to fraction form
    1,394.41/2,091.51 = 572.46/x
  3. Step 3: Cross multiply
    1,394.41x = 2,091.51 × 572.46
  4. Step 4: Simplify right side
    1,394.41x = 1,197,305.81
  5. Step 5: Solve for x
    x = 1,197,305.81/1,394.41
  6. Step 6: Final answer
    x = 858.65

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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.