Home / 385,621.11-578,549.79-172,568.31

Finding the Fourth Proportional to 385,621.11, 578,549.79 and 172,568.31

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Solution

The fourth proportional to 385,621.11, 578,549.79 and 172,568.31 is: 258,905.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,621.11 : 578,549.79 = 172,568.31 : x
  2. Step 2: Convert to fraction form
    385,621.11/578,549.79 = 172,568.31/x
  3. Step 3: Cross multiply
    385,621.11x = 578,549.79 × 172,568.31
  4. Step 4: Simplify right side
    385,621.11x = 99,839,359,511.15
  5. Step 5: Solve for x
    x = 99,839,359,511.15/385,621.11
  6. Step 6: Final answer
    x = 258,905.33

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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.