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Finding the Fourth Proportional to 388,906.80, 583,226.55 and 189,098.43

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Solution

The fourth proportional to 388,906.80, 583,226.55 and 189,098.43 is: 283,582.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,906.80 : 583,226.55 = 189,098.43 : x
  2. Step 2: Convert to fraction form
    388,906.80/583,226.55 = 189,098.43/x
  3. Step 3: Cross multiply
    388,906.80x = 583,226.55 × 189,098.43
  4. Step 4: Simplify right side
    388,906.80x = 110,287,224,939.32
  5. Step 5: Solve for x
    x = 110,287,224,939.32/388,906.80
  6. Step 6: Final answer
    x = 283,582.66

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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.