Home / 420,100.43-579,573.55-258,675.53

Finding the Fourth Proportional to 420,100.43, 579,573.55 and 258,675.53

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Solution

The fourth proportional to 420,100.43, 579,573.55 and 258,675.53 is: 356,870.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,100.43 : 579,573.55 = 258,675.53 : x
  2. Step 2: Convert to fraction form
    420,100.43/579,573.55 = 258,675.53/x
  3. Step 3: Cross multiply
    420,100.43x = 579,573.55 × 258,675.53
  4. Step 4: Simplify right side
    420,100.43x = 149,921,496,669.17
  5. Step 5: Solve for x
    x = 149,921,496,669.17/420,100.43
  6. Step 6: Final answer
    x = 356,870.61

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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.