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Finding the Fourth Proportional to 426,017.10, 638,248.05 and 259,610.70

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Solution

The fourth proportional to 426,017.10, 638,248.05 and 259,610.70 is: 388,942.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,017.10 : 638,248.05 = 259,610.70 : x
  2. Step 2: Convert to fraction form
    426,017.10/638,248.05 = 259,610.70/x
  3. Step 3: Cross multiply
    426,017.10x = 638,248.05 × 259,610.70
  4. Step 4: Simplify right side
    426,017.10x = 165,696,023,034.14
  5. Step 5: Solve for x
    x = 165,696,023,034.14/426,017.10
  6. Step 6: Final answer
    x = 388,942.19

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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.