Home / 426,126.10-638,411.55-259,719.70

Finding the Fourth Proportional to 426,126.10, 638,411.55 and 259,719.70

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Solution

The fourth proportional to 426,126.10, 638,411.55 and 259,719.70 is: 389,105.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,126.10 : 638,411.55 = 259,719.70 : x
  2. Step 2: Convert to fraction form
    426,126.10/638,411.55 = 259,719.70/x
  3. Step 3: Cross multiply
    426,126.10x = 638,411.55 × 259,719.70
  4. Step 4: Simplify right side
    426,126.10x = 165,808,056,242.54
  5. Step 5: Solve for x
    x = 165,808,056,242.54/426,126.10
  6. Step 6: Final answer
    x = 389,105.61

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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.