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Finding the Fourth Proportional to 286,721.20, 430,168.20 and 203,777.20

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Solution

The fourth proportional to 286,721.20, 430,168.20 and 203,777.20 is: 305,727.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,721.20 : 430,168.20 = 203,777.20 : x
  2. Step 2: Convert to fraction form
    286,721.20/430,168.20 = 203,777.20/x
  3. Step 3: Cross multiply
    286,721.20x = 430,168.20 × 203,777.20
  4. Step 4: Simplify right side
    286,721.20x = 87,658,471,325.04
  5. Step 5: Solve for x
    x = 87,658,471,325.04/286,721.20
  6. Step 6: Final answer
    x = 305,727.21

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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.