Home / 638,977.97-881,775.38-352,497.98

Finding the Fourth Proportional to 638,977.97, 881,775.38 and 352,497.98

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Solution

The fourth proportional to 638,977.97, 881,775.38 and 352,497.98 is: 486,439.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,977.97 : 881,775.38 = 352,497.98 : x
  2. Step 2: Convert to fraction form
    638,977.97/881,775.38 = 352,497.98/x
  3. Step 3: Cross multiply
    638,977.97x = 881,775.38 × 352,497.98
  4. Step 4: Simplify right side
    638,977.97x = 310,824,035,854.86
  5. Step 5: Solve for x
    x = 310,824,035,854.86/638,977.97
  6. Step 6: Final answer
    x = 486,439.37

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Double scale
Find fourth proportional to 638,978.97, 881,776.76 and 352,498.98
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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.