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Finding the Fourth Proportional to 392,210.80, 587,126.58 and 354,786.64

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Solution

The fourth proportional to 392,210.80, 587,126.58 and 354,786.64 is: 531,103.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,210.80 : 587,126.58 = 354,786.64 : x
  2. Step 2: Convert to fraction form
    392,210.80/587,126.58 = 354,786.64/x
  3. Step 3: Cross multiply
    392,210.80x = 587,126.58 × 354,786.64
  4. Step 4: Simplify right side
    392,210.80x = 208,304,666,572.89
  5. Step 5: Solve for x
    x = 208,304,666,572.89/392,210.80
  6. Step 6: Final answer
    x = 531,103.85

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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.