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Finding the Fourth Proportional to 283,679.20, 425,518.80 and 143,419.60

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Solution

The fourth proportional to 283,679.20, 425,518.80 and 143,419.60 is: 215,129.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,679.20 : 425,518.80 = 143,419.60 : x
  2. Step 2: Convert to fraction form
    283,679.20/425,518.80 = 143,419.60/x
  3. Step 3: Cross multiply
    283,679.20x = 425,518.80 × 143,419.60
  4. Step 4: Simplify right side
    283,679.20x = 61,027,736,088.48
  5. Step 5: Solve for x
    x = 61,027,736,088.48/283,679.20
  6. Step 6: Final answer
    x = 215,129.40

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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.