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Finding the Fourth Proportional to 1,368.57, 2,054.39 and 547.42

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Solution

The fourth proportional to 1,368.57, 2,054.39 and 547.42 is: 821.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.57 : 2,054.39 = 547.42 : x
  2. Step 2: Convert to fraction form
    1,368.57/2,054.39 = 547.42/x
  3. Step 3: Cross multiply
    1,368.57x = 2,054.39 × 547.42
  4. Step 4: Simplify right side
    1,368.57x = 1,124,613.23
  5. Step 5: Solve for x
    x = 1,124,613.23/1,368.57
  6. Step 6: Final answer
    x = 821.74

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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.