Home / 1,538.47-2,308.05-442.75

Finding the Fourth Proportional to 1,538.47, 2,308.05 and 442.75

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Solution

The fourth proportional to 1,538.47, 2,308.05 and 442.75 is: 664.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.47 : 2,308.05 = 442.75 : x
  2. Step 2: Convert to fraction form
    1,538.47/2,308.05 = 442.75/x
  3. Step 3: Cross multiply
    1,538.47x = 2,308.05 × 442.75
  4. Step 4: Simplify right side
    1,538.47x = 1,021,886.92
  5. Step 5: Solve for x
    x = 1,021,886.92/1,538.47
  6. Step 6: Final answer
    x = 664.22

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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.