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Finding the Fourth Proportional to 642,081.79, 886,062 and 355,595.73

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Solution

The fourth proportional to 642,081.79, 886,062 and 355,595.73 is: 490,716.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,081.79 : 886,062 = 355,595.73 : x
  2. Step 2: Convert to fraction form
    642,081.79/886,062 = 355,595.73/x
  3. Step 3: Cross multiply
    642,081.79x = 886,062 × 355,595.73
  4. Step 4: Simplify right side
    642,081.79x = 315,079,863,715.26
  5. Step 5: Solve for x
    x = 315,079,863,715.26/642,081.79
  6. Step 6: Final answer
    x = 490,716.09

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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.