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Finding the Fourth Proportional to 388,909.80, 583,231.05 and 189,101.43

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Solution

The fourth proportional to 388,909.80, 583,231.05 and 189,101.43 is: 283,587.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,909.80 : 583,231.05 = 189,101.43 : x
  2. Step 2: Convert to fraction form
    388,909.80/583,231.05 = 189,101.43/x
  3. Step 3: Cross multiply
    388,909.80x = 583,231.05 × 189,101.43
  4. Step 4: Simplify right side
    388,909.80x = 110,289,825,575.40
  5. Step 5: Solve for x
    x = 110,289,825,575.40/388,909.80
  6. Step 6: Final answer
    x = 283,587.16

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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.