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Finding the Fourth Proportional to 288,006.20, 432,009.30 and 280,230.20

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Solution

The fourth proportional to 288,006.20, 432,009.30 and 280,230.20 is: 420,345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,006.20 : 432,009.30 = 280,230.20 : x
  2. Step 2: Convert to fraction form
    288,006.20/432,009.30 = 280,230.20/x
  3. Step 3: Cross multiply
    288,006.20x = 432,009.30 × 280,230.20
  4. Step 4: Simplify right side
    288,006.20x = 121,062,052,540.86
  5. Step 5: Solve for x
    x = 121,062,052,540.86/288,006.20
  6. Step 6: Final answer
    x = 420,345.30

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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.