Home / 426,122.10-638,405.55-259,715.70

Finding the Fourth Proportional to 426,122.10, 638,405.55 and 259,715.70

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Solution

The fourth proportional to 426,122.10, 638,405.55 and 259,715.70 is: 389,099.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,122.10 : 638,405.55 = 259,715.70 : x
  2. Step 2: Convert to fraction form
    426,122.10/638,405.55 = 259,715.70/x
  3. Step 3: Cross multiply
    426,122.10x = 638,405.55 × 259,715.70
  4. Step 4: Simplify right side
    426,122.10x = 165,803,944,302.14
  5. Step 5: Solve for x
    x = 165,803,944,302.14/426,122.10
  6. Step 6: Final answer
    x = 389,099.61

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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.