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Finding the Fourth Proportional to 723,682.24, 998,640.72 and 401,369.20

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Solution

The fourth proportional to 723,682.24, 998,640.72 and 401,369.20 is: 553,866.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,682.24 : 998,640.72 = 401,369.20 : x
  2. Step 2: Convert to fraction form
    723,682.24/998,640.72 = 401,369.20/x
  3. Step 3: Cross multiply
    723,682.24x = 998,640.72 × 401,369.20
  4. Step 4: Simplify right side
    723,682.24x = 400,823,626,873.82
  5. Step 5: Solve for x
    x = 400,823,626,873.82/723,682.24
  6. Step 6: Final answer
    x = 553,866.88

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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.