Home / 638,865.66-881,619.17-352,379.60

Finding the Fourth Proportional to 638,865.66, 881,619.17 and 352,379.60

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Solution

The fourth proportional to 638,865.66, 881,619.17 and 352,379.60 is: 486,275.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,865.66 : 881,619.17 = 352,379.60 : x
  2. Step 2: Convert to fraction form
    638,865.66/881,619.17 = 352,379.60/x
  3. Step 3: Cross multiply
    638,865.66x = 881,619.17 × 352,379.60
  4. Step 4: Simplify right side
    638,865.66x = 310,664,604,306.94
  5. Step 5: Solve for x
    x = 310,664,604,306.94/638,865.66
  6. Step 6: Final answer
    x = 486,275.32

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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.