Home / 287,278.10-430,917.15-259,721.90

Finding the Fourth Proportional to 287,278.10, 430,917.15 and 259,721.90

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Solution

The fourth proportional to 287,278.10, 430,917.15 and 259,721.90 is: 389,582.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,278.10 : 430,917.15 = 259,721.90 : x
  2. Step 2: Convert to fraction form
    287,278.10/430,917.15 = 259,721.90/x
  3. Step 3: Cross multiply
    287,278.10x = 430,917.15 × 259,721.90
  4. Step 4: Simplify right side
    287,278.10x = 111,918,620,940.59
  5. Step 5: Solve for x
    x = 111,918,620,940.59/287,278.10
  6. Step 6: Final answer
    x = 389,582.85

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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.