Home / 1,308.12-1,962.36-442.56

Finding the Fourth Proportional to 1,308.12, 1,962.36 and 442.56

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Solution

The fourth proportional to 1,308.12, 1,962.36 and 442.56 is: 663.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.12 : 1,962.36 = 442.56 : x
  2. Step 2: Convert to fraction form
    1,308.12/1,962.36 = 442.56/x
  3. Step 3: Cross multiply
    1,308.12x = 1,962.36 × 442.56
  4. Step 4: Simplify right side
    1,308.12x = 868,462.04
  5. Step 5: Solve for x
    x = 868,462.04/1,308.12
  6. Step 6: Final answer
    x = 663.90

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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.