Home / 385,633.20-578,449.80-136,315.20

Finding the Fourth Proportional to 385,633.20, 578,449.80 and 136,315.20

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Solution

The fourth proportional to 385,633.20, 578,449.80 and 136,315.20 is: 204,472.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,633.20 : 578,449.80 = 136,315.20 : x
  2. Step 2: Convert to fraction form
    385,633.20/578,449.80 = 136,315.20/x
  3. Step 3: Cross multiply
    385,633.20x = 578,449.80 × 136,315.20
  4. Step 4: Simplify right side
    385,633.20x = 78,851,500,176.96
  5. Step 5: Solve for x
    x = 78,851,500,176.96/385,633.20
  6. Step 6: Final answer
    x = 204,472.80

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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.