Home / 1,308.28-1,962.36-383.80

Finding the Fourth Proportional to 1,308.28, 1,962.36 and 383.80

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Solution

The fourth proportional to 1,308.28, 1,962.36 and 383.80 is: 575.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.28 : 1,962.36 = 383.80 : x
  2. Step 2: Convert to fraction form
    1,308.28/1,962.36 = 383.80/x
  3. Step 3: Cross multiply
    1,308.28x = 1,962.36 × 383.80
  4. Step 4: Simplify right side
    1,308.28x = 753,153.77
  5. Step 5: Solve for x
    x = 753,153.77/1,308.28
  6. Step 6: Final answer
    x = 575.68

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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.