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Finding the Fourth Proportional to 259,204.80, 388,807.20 and 72,216.30

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Solution

The fourth proportional to 259,204.80, 388,807.20 and 72,216.30 is: 108,324.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,204.80 : 388,807.20 = 72,216.30 : x
  2. Step 2: Convert to fraction form
    259,204.80/388,807.20 = 72,216.30/x
  3. Step 3: Cross multiply
    259,204.80x = 388,807.20 × 72,216.30
  4. Step 4: Simplify right side
    259,204.80x = 28,078,217,397.36
  5. Step 5: Solve for x
    x = 28,078,217,397.36/259,204.80
  6. Step 6: Final answer
    x = 108,324.45

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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.