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Finding the Fourth Proportional to 372,679.80, 559,019.70 and 343,811.40

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Solution

The fourth proportional to 372,679.80, 559,019.70 and 343,811.40 is: 515,717.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,679.80 : 559,019.70 = 343,811.40 : x
  2. Step 2: Convert to fraction form
    372,679.80/559,019.70 = 343,811.40/x
  3. Step 3: Cross multiply
    372,679.80x = 559,019.70 × 343,811.40
  4. Step 4: Simplify right side
    372,679.80x = 192,197,345,684.58
  5. Step 5: Solve for x
    x = 192,197,345,684.58/372,679.80
  6. Step 6: Final answer
    x = 515,717.10

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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.