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Finding the Fourth Proportional to 283,961.20, 425,941.80 and 84,312.40

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Solution

The fourth proportional to 283,961.20, 425,941.80 and 84,312.40 is: 126,468.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,961.20 : 425,941.80 = 84,312.40 : x
  2. Step 2: Convert to fraction form
    283,961.20/425,941.80 = 84,312.40/x
  3. Step 3: Cross multiply
    283,961.20x = 425,941.80 × 84,312.40
  4. Step 4: Simplify right side
    283,961.20x = 35,912,175,418.32
  5. Step 5: Solve for x
    x = 35,912,175,418.32/283,961.20
  6. Step 6: Final answer
    x = 126,468.60

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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.