Home / 385,604.26-578,400.20-105,121.51

Finding the Fourth Proportional to 385,604.26, 578,400.20 and 105,121.51

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Solution

The fourth proportional to 385,604.26, 578,400.20 and 105,121.51 is: 157,680.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,604.26 : 578,400.20 = 105,121.51 : x
  2. Step 2: Convert to fraction form
    385,604.26/578,400.20 = 105,121.51/x
  3. Step 3: Cross multiply
    385,604.26x = 578,400.20 × 105,121.51
  4. Step 4: Simplify right side
    385,604.26x = 60,802,302,408.30
  5. Step 5: Solve for x
    x = 60,802,302,408.30/385,604.26
  6. Step 6: Final answer
    x = 157,680.58

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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.