Home / 678,500.20-1,018,139.10-258,077.80

Finding the Fourth Proportional to 678,500.20, 1,018,139.10 and 258,077.80

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Solution

The fourth proportional to 678,500.20, 1,018,139.10 and 258,077.80 is: 387,264.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,500.20 : 1,018,139.10 = 258,077.80 : x
  2. Step 2: Convert to fraction form
    678,500.20/1,018,139.10 = 258,077.80/x
  3. Step 3: Cross multiply
    678,500.20x = 1,018,139.10 × 258,077.80
  4. Step 4: Simplify right side
    678,500.20x = 262,759,099,021.98
  5. Step 5: Solve for x
    x = 262,759,099,021.98/678,500.20
  6. Step 6: Final answer
    x = 387,264.59

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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.