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Finding the Fourth Proportional to 642,620.09, 886,825.46 and 352,229.42

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Solution

The fourth proportional to 642,620.09, 886,825.46 and 352,229.42 is: 486,081.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,620.09 : 886,825.46 = 352,229.42 : x
  2. Step 2: Convert to fraction form
    642,620.09/886,825.46 = 352,229.42/x
  3. Step 3: Cross multiply
    642,620.09x = 886,825.46 × 352,229.42
  4. Step 4: Simplify right side
    642,620.09x = 312,366,017,417.03
  5. Step 5: Solve for x
    x = 312,366,017,417.03/642,620.09
  6. Step 6: Final answer
    x = 486,081.94

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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.