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Finding the Fourth Proportional to 480,694.36, 724,286.59 and 398,288.20

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Solution

The fourth proportional to 480,694.36, 724,286.59 and 398,288.20 is: 600,121.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,694.36 : 724,286.59 = 398,288.20 : x
  2. Step 2: Convert to fraction form
    480,694.36/724,286.59 = 398,288.20/x
  3. Step 3: Cross multiply
    480,694.36x = 724,286.59 × 398,288.20
  4. Step 4: Simplify right side
    480,694.36x = 288,474,802,215.24
  5. Step 5: Solve for x
    x = 288,474,802,215.24/480,694.36
  6. Step 6: Final answer
    x = 600,121.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.