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Finding the Fourth Proportional to 388,937.88, 583,406.81 and 126,281.88

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Solution

The fourth proportional to 388,937.88, 583,406.81 and 126,281.88 is: 189,422.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,937.88 : 583,406.81 = 126,281.88 : x
  2. Step 2: Convert to fraction form
    388,937.88/583,406.81 = 126,281.88/x
  3. Step 3: Cross multiply
    388,937.88x = 583,406.81 × 126,281.88
  4. Step 4: Simplify right side
    388,937.88x = 73,673,708,771.60
  5. Step 5: Solve for x
    x = 73,673,708,771.60/388,937.88
  6. Step 6: Final answer
    x = 189,422.82

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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.