Home / 643,255.77-963,665.76-429,378.80

Finding the Fourth Proportional to 643,255.77, 963,665.76 and 429,378.80

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Solution

The fourth proportional to 643,255.77, 963,665.76 and 429,378.80 is: 643,255.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,255.77 : 963,665.76 = 429,378.80 : x
  2. Step 2: Convert to fraction form
    643,255.77/963,665.76 = 429,378.80/x
  3. Step 3: Cross multiply
    643,255.77x = 963,665.76 × 429,378.80
  4. Step 4: Simplify right side
    643,255.77x = 413,777,642,811.56
  5. Step 5: Solve for x
    x = 413,777,642,811.56/643,255.77
  6. Step 6: Final answer
    x = 643,255.24

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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.