Home / 385,879.04-578,740.48-105,372.80

Finding the Fourth Proportional to 385,879.04, 578,740.48 and 105,372.80

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Solution

The fourth proportional to 385,879.04, 578,740.48 and 105,372.80 is: 158,037.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,879.04 : 578,740.48 = 105,372.80 : x
  2. Step 2: Convert to fraction form
    385,879.04/578,740.48 = 105,372.80/x
  3. Step 3: Cross multiply
    385,879.04x = 578,740.48 × 105,372.80
  4. Step 4: Simplify right side
    385,879.04x = 60,983,504,850.94
  5. Step 5: Solve for x
    x = 60,983,504,850.94/385,879.04
  6. Step 6: Final answer
    x = 158,037.88

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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.