Home / 861,063.90-1,291,640.49-261,977.82

Finding the Fourth Proportional to 861,063.90, 1,291,640.49 and 261,977.82

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Solution

The fourth proportional to 861,063.90, 1,291,640.49 and 261,977.82 is: 392,980.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,063.90 : 1,291,640.49 = 261,977.82 : x
  2. Step 2: Convert to fraction form
    861,063.90/1,291,640.49 = 261,977.82/x
  3. Step 3: Cross multiply
    861,063.90x = 1,291,640.49 × 261,977.82
  4. Step 4: Simplify right side
    861,063.90x = 338,381,159,793.93
  5. Step 5: Solve for x
    x = 338,381,159,793.93/861,063.90
  6. Step 6: Final answer
    x = 392,980.31

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1.5x scale

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.