Home / 385,475.30-578,331.29-172,422.42

Finding the Fourth Proportional to 385,475.30, 578,331.29 and 172,422.42

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Solution

The fourth proportional to 385,475.30, 578,331.29 and 172,422.42 is: 258,686.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,475.30 : 578,331.29 = 172,422.42 : x
  2. Step 2: Convert to fraction form
    385,475.30/578,331.29 = 172,422.42/x
  3. Step 3: Cross multiply
    385,475.30x = 578,331.29 × 172,422.42
  4. Step 4: Simplify right side
    385,475.30x = 99,717,282,098.95
  5. Step 5: Solve for x
    x = 99,717,282,098.95/385,475.30
  6. Step 6: Final answer
    x = 258,686.56

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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.