Home / 640,665.12-884,340.50-368,841.33

Finding the Fourth Proportional to 640,665.12, 884,340.50 and 368,841.33

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Solution

The fourth proportional to 640,665.12, 884,340.50 and 368,841.33 is: 509,129.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,665.12 : 884,340.50 = 368,841.33 : x
  2. Step 2: Convert to fraction form
    640,665.12/884,340.50 = 368,841.33/x
  3. Step 3: Cross multiply
    640,665.12x = 884,340.50 × 368,841.33
  4. Step 4: Simplify right side
    640,665.12x = 326,181,324,348.66
  5. Step 5: Solve for x
    x = 326,181,324,348.66/640,665.12
  6. Step 6: Final answer
    x = 509,129.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.