Home / 500,341.21-690,584.33-391,229.69

Finding the Fourth Proportional to 500,341.21, 690,584.33 and 391,229.69

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Solution

The fourth proportional to 500,341.21, 690,584.33 and 391,229.69 is: 539,985.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,341.21 : 690,584.33 = 391,229.69 : x
  2. Step 2: Convert to fraction form
    500,341.21/690,584.33 = 391,229.69/x
  3. Step 3: Cross multiply
    500,341.21x = 690,584.33 × 391,229.69
  4. Step 4: Simplify right side
    500,341.21x = 270,177,090,869.91
  5. Step 5: Solve for x
    x = 270,177,090,869.91/500,341.21
  6. Step 6: Final answer
    x = 539,985.69

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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.