Home / 283,239.21-390,878.30-154,186.05

Finding the Fourth Proportional to 283,239.21, 390,878.30 and 154,186.05

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Solution

The fourth proportional to 283,239.21, 390,878.30 and 154,186.05 is: 212,781.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,239.21 : 390,878.30 = 154,186.05 : x
  2. Step 2: Convert to fraction form
    283,239.21/390,878.30 = 154,186.05/x
  3. Step 3: Cross multiply
    283,239.21x = 390,878.30 × 154,186.05
  4. Step 4: Simplify right side
    283,239.21x = 60,267,981,107.72
  5. Step 5: Solve for x
    x = 60,267,981,107.72/283,239.21
  6. Step 6: Final answer
    x = 212,781.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.