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Finding the Fourth Proportional to 1,538.95, 2,308.16 and 443.06

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Solution

The fourth proportional to 1,538.95, 2,308.16 and 443.06 is: 664.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.95 : 2,308.16 = 443.06 : x
  2. Step 2: Convert to fraction form
    1,538.95/2,308.16 = 443.06/x
  3. Step 3: Cross multiply
    1,538.95x = 2,308.16 × 443.06
  4. Step 4: Simplify right side
    1,538.95x = 1,022,639.61
  5. Step 5: Solve for x
    x = 1,022,639.61/1,538.95
  6. Step 6: Final answer
    x = 664.51

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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.