Home / 385,330.68-578,000.34-172,109.43

Finding the Fourth Proportional to 385,330.68, 578,000.34 and 172,109.43

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Solution

The fourth proportional to 385,330.68, 578,000.34 and 172,109.43 is: 258,166.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,330.68 : 578,000.34 = 172,109.43 : x
  2. Step 2: Convert to fraction form
    385,330.68/578,000.34 = 172,109.43/x
  3. Step 3: Cross multiply
    385,330.68x = 578,000.34 × 172,109.43
  4. Step 4: Simplify right side
    385,330.68x = 99,479,309,057.21
  5. Step 5: Solve for x
    x = 99,479,309,057.21/385,330.68
  6. Step 6: Final answer
    x = 258,166.07

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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.