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Finding the Fourth Proportional to 439,895.28, 660,309.51 and 389,620.67

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Solution

The fourth proportional to 439,895.28, 660,309.51 and 389,620.67 is: 584,844.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,895.28 : 660,309.51 = 389,620.67 : x
  2. Step 2: Convert to fraction form
    439,895.28/660,309.51 = 389,620.67/x
  3. Step 3: Cross multiply
    439,895.28x = 660,309.51 × 389,620.67
  4. Step 4: Simplify right side
    439,895.28x = 257,270,230,392.02
  5. Step 5: Solve for x
    x = 257,270,230,392.02/439,895.28
  6. Step 6: Final answer
    x = 584,844.26

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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.