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Finding the Fourth Proportional to 283,803.20, 425,121.60 and 143,640.80

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Solution

The fourth proportional to 283,803.20, 425,121.60 and 143,640.80 is: 215,166.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,803.20 : 425,121.60 = 143,640.80 : x
  2. Step 2: Convert to fraction form
    283,803.20/425,121.60 = 143,640.80/x
  3. Step 3: Cross multiply
    283,803.20x = 425,121.60 × 143,640.80
  4. Step 4: Simplify right side
    283,803.20x = 61,064,806,721.28
  5. Step 5: Solve for x
    x = 61,064,806,721.28/283,803.20
  6. Step 6: Final answer
    x = 215,166.03

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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.