Home / 678,865.50-1,018,429.38-258,108.66

Finding the Fourth Proportional to 678,865.50, 1,018,429.38 and 258,108.66

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Solution

The fourth proportional to 678,865.50, 1,018,429.38 and 258,108.66 is: 387,212.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,865.50 : 1,018,429.38 = 258,108.66 : x
  2. Step 2: Convert to fraction form
    678,865.50/1,018,429.38 = 258,108.66/x
  3. Step 3: Cross multiply
    678,865.50x = 1,018,429.38 × 258,108.66
  4. Step 4: Simplify right side
    678,865.50x = 262,865,442,576.43
  5. Step 5: Solve for x
    x = 262,865,442,576.43/678,865.50
  6. Step 6: Final answer
    x = 387,212.85

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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.