Home / 1,290,824.61-1,781,339.75-717,864.78

Finding the Fourth Proportional to 1,290,824.61, 1,781,339.75 and 717,864.78

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Solution

The fourth proportional to 1,290,824.61, 1,781,339.75 and 717,864.78 is: 990,654.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,824.61 : 1,781,339.75 = 717,864.78 : x
  2. Step 2: Convert to fraction form
    1,290,824.61/1,781,339.75 = 717,864.78/x
  3. Step 3: Cross multiply
    1,290,824.61x = 1,781,339.75 × 717,864.78
  4. Step 4: Simplify right side
    1,290,824.61x = 1,278,761,063,501.66
  5. Step 5: Solve for x
    x = 1,278,761,063,501.66/1,290,824.61
  6. Step 6: Final answer
    x = 990,654.39

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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.