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Finding the Fourth Proportional to 500,521.69, 690,720.23 and 274,170.97

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Solution

The fourth proportional to 500,521.69, 690,720.23 and 274,170.97 is: 378,356.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,521.69 : 690,720.23 = 274,170.97 : x
  2. Step 2: Convert to fraction form
    500,521.69/690,720.23 = 274,170.97/x
  3. Step 3: Cross multiply
    500,521.69x = 690,720.23 × 274,170.97
  4. Step 4: Simplify right side
    500,521.69x = 189,375,435,457.72
  5. Step 5: Solve for x
    x = 189,375,435,457.72/500,521.69
  6. Step 6: Final answer
    x = 378,356.10

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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.