Home / 385,458.05-578,305.39-172,405.22

Finding the Fourth Proportional to 385,458.05, 578,305.39 and 172,405.22

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Solution

The fourth proportional to 385,458.05, 578,305.39 and 172,405.22 is: 258,660.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,458.05 : 578,305.39 = 172,405.22 : x
  2. Step 2: Convert to fraction form
    385,458.05/578,305.39 = 172,405.22/x
  3. Step 3: Cross multiply
    385,458.05x = 578,305.39 × 172,405.22
  4. Step 4: Simplify right side
    385,458.05x = 99,702,869,004.89
  5. Step 5: Solve for x
    x = 99,702,869,004.89/385,458.05
  6. Step 6: Final answer
    x = 258,660.75

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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.