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Finding the Fourth Proportional to 288,676.80, 433,015.20 and 88,979.40

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Solution

The fourth proportional to 288,676.80, 433,015.20 and 88,979.40 is: 133,469.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,676.80 : 433,015.20 = 88,979.40 : x
  2. Step 2: Convert to fraction form
    288,676.80/433,015.20 = 88,979.40/x
  3. Step 3: Cross multiply
    288,676.80x = 433,015.20 × 88,979.40
  4. Step 4: Simplify right side
    288,676.80x = 38,529,432,686.88
  5. Step 5: Solve for x
    x = 38,529,432,686.88/288,676.80
  6. Step 6: Final answer
    x = 133,469.10

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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.