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Finding the Fourth Proportional to 283,811.20, 425,133.60 and 143,648.80

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Solution

The fourth proportional to 283,811.20, 425,133.60 and 143,648.80 is: 215,178.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,811.20 : 425,133.60 = 143,648.80 : x
  2. Step 2: Convert to fraction form
    283,811.20/425,133.60 = 143,648.80/x
  3. Step 3: Cross multiply
    283,811.20x = 425,133.60 × 143,648.80
  4. Step 4: Simplify right side
    283,811.20x = 61,069,931,479.68
  5. Step 5: Solve for x
    x = 61,069,931,479.68/283,811.20
  6. Step 6: Final answer
    x = 215,178.02

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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.