Home / 330,272.40-495,408.60-212,077.20

Finding the Fourth Proportional to 330,272.40, 495,408.60 and 212,077.20

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Solution

The fourth proportional to 330,272.40, 495,408.60 and 212,077.20 is: 318,115.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,272.40 : 495,408.60 = 212,077.20 : x
  2. Step 2: Convert to fraction form
    330,272.40/495,408.60 = 212,077.20/x
  3. Step 3: Cross multiply
    330,272.40x = 495,408.60 × 212,077.20
  4. Step 4: Simplify right side
    330,272.40x = 105,064,868,743.92
  5. Step 5: Solve for x
    x = 105,064,868,743.92/330,272.40
  6. Step 6: Final answer
    x = 318,115.80

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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.