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Finding the Fourth Proportional to 659,604.20, 989,110.65 and 260,039.30

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Solution

The fourth proportional to 659,604.20, 989,110.65 and 260,039.30 is: 389,942.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,604.20 : 989,110.65 = 260,039.30 : x
  2. Step 2: Convert to fraction form
    659,604.20/989,110.65 = 260,039.30/x
  3. Step 3: Cross multiply
    659,604.20x = 989,110.65 × 260,039.30
  4. Step 4: Simplify right side
    659,604.20x = 257,207,641,048.55
  5. Step 5: Solve for x
    x = 257,207,641,048.55/659,604.20
  6. Step 6: Final answer
    x = 389,942.39

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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.