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Finding the Fourth Proportional to 1,538.39, 2,308.30 and 564.57

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Solution

The fourth proportional to 1,538.39, 2,308.30 and 564.57 is: 847.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.39 : 2,308.30 = 564.57 : x
  2. Step 2: Convert to fraction form
    1,538.39/2,308.30 = 564.57/x
  3. Step 3: Cross multiply
    1,538.39x = 2,308.30 × 564.57
  4. Step 4: Simplify right side
    1,538.39x = 1,303,195.52
  5. Step 5: Solve for x
    x = 1,303,195.52/1,538.39
  6. Step 6: Final answer
    x = 847.12

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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.