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Finding the Fourth Proportional to 723,408.12, 998,315.16 and 401,131.80

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Solution

The fourth proportional to 723,408.12, 998,315.16 and 401,131.80 is: 553,568.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,408.12 : 998,315.16 = 401,131.80 : x
  2. Step 2: Convert to fraction form
    723,408.12/998,315.16 = 401,131.80/x
  3. Step 3: Cross multiply
    723,408.12x = 998,315.16 × 401,131.80
  4. Step 4: Simplify right side
    723,408.12x = 400,455,957,098.09
  5. Step 5: Solve for x
    x = 400,455,957,098.09/723,408.12
  6. Step 6: Final answer
    x = 553,568.51

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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.