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Finding the Fourth Proportional to 439,597.80, 659,389.55 and 140,074.34

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Solution

The fourth proportional to 439,597.80, 659,389.55 and 140,074.34 is: 210,109.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,597.80 : 659,389.55 = 140,074.34 : x
  2. Step 2: Convert to fraction form
    439,597.80/659,389.55 = 140,074.34/x
  3. Step 3: Cross multiply
    439,597.80x = 659,389.55 × 140,074.34
  4. Step 4: Simplify right side
    439,597.80x = 92,363,552,021.83
  5. Step 5: Solve for x
    x = 92,363,552,021.83/439,597.80
  6. Step 6: Final answer
    x = 210,109.22

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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.