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Finding the Fourth Proportional to 393,590.52, 590,342.04 and 140,860.80

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Solution

The fourth proportional to 393,590.52, 590,342.04 and 140,860.80 is: 211,275.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,590.52 : 590,342.04 = 140,860.80 : x
  2. Step 2: Convert to fraction form
    393,590.52/590,342.04 = 140,860.80/x
  3. Step 3: Cross multiply
    393,590.52x = 590,342.04 × 140,860.80
  4. Step 4: Simplify right side
    393,590.52x = 83,156,052,028.03
  5. Step 5: Solve for x
    x = 83,156,052,028.03/393,590.52
  6. Step 6: Final answer
    x = 211,275.55

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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.