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Finding the Fourth Proportional to 485,278.80, 726,190.20 and 307,870.80

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Solution

The fourth proportional to 485,278.80, 726,190.20 and 307,870.80 is: 460,709.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,278.80 : 726,190.20 = 307,870.80 : x
  2. Step 2: Convert to fraction form
    485,278.80/726,190.20 = 307,870.80/x
  3. Step 3: Cross multiply
    485,278.80x = 726,190.20 × 307,870.80
  4. Step 4: Simplify right side
    485,278.80x = 223,572,757,826.16
  5. Step 5: Solve for x
    x = 223,572,757,826.16/485,278.80
  6. Step 6: Final answer
    x = 460,709.92

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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.