Home / 768,420.29-1,060,376.87-428,910.41

Finding the Fourth Proportional to 768,420.29, 1,060,376.87 and 428,910.41

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Solution

The fourth proportional to 768,420.29, 1,060,376.87 and 428,910.41 is: 591,872.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,420.29 : 1,060,376.87 = 428,910.41 : x
  2. Step 2: Convert to fraction form
    768,420.29/1,060,376.87 = 428,910.41/x
  3. Step 3: Cross multiply
    768,420.29x = 1,060,376.87 × 428,910.41
  4. Step 4: Simplify right side
    768,420.29x = 454,806,675,921.67
  5. Step 5: Solve for x
    x = 454,806,675,921.67/768,420.29
  6. Step 6: Final answer
    x = 591,872.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.