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Finding the Fourth Proportional to 324,746.20, 485,807.10 and 280,860.40

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Solution

The fourth proportional to 324,746.20, 485,807.10 and 280,860.40 is: 420,155.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,746.20 : 485,807.10 = 280,860.40 : x
  2. Step 2: Convert to fraction form
    324,746.20/485,807.10 = 280,860.40/x
  3. Step 3: Cross multiply
    324,746.20x = 485,807.10 × 280,860.40
  4. Step 4: Simplify right side
    324,746.20x = 136,443,976,428.84
  5. Step 5: Solve for x
    x = 136,443,976,428.84/324,746.20
  6. Step 6: Final answer
    x = 420,155.73

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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.