Home / 501,173.15-690,949.85-398,149.17

Finding the Fourth Proportional to 501,173.15, 690,949.85 and 398,149.17

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Solution

The fourth proportional to 501,173.15, 690,949.85 and 398,149.17 is: 548,914.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,173.15 : 690,949.85 = 398,149.17 : x
  2. Step 2: Convert to fraction form
    501,173.15/690,949.85 = 398,149.17/x
  3. Step 3: Cross multiply
    501,173.15x = 690,949.85 × 398,149.17
  4. Step 4: Simplify right side
    501,173.15x = 275,101,107,298.38
  5. Step 5: Solve for x
    x = 275,101,107,298.38/501,173.15
  6. Step 6: Final answer
    x = 548,914.30

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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.