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Finding the Fourth Proportional to 2,148.30, 3,223.88 and 761.62

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Solution

The fourth proportional to 2,148.30, 3,223.88 and 761.62 is: 1,142.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.30 : 3,223.88 = 761.62 : x
  2. Step 2: Convert to fraction form
    2,148.30/3,223.88 = 761.62/x
  3. Step 3: Cross multiply
    2,148.30x = 3,223.88 × 761.62
  4. Step 4: Simplify right side
    2,148.30x = 2,455,371.49
  5. Step 5: Solve for x
    x = 2,455,371.49/2,148.30
  6. Step 6: Final answer
    x = 1,142.94

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1.5x scale

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.