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Finding the Fourth Proportional to 723,556, 998,507.28 and 401,315.44

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Solution

The fourth proportional to 723,556, 998,507.28 and 401,315.44 is: 553,815.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,556 : 998,507.28 = 401,315.44 : x
  2. Step 2: Convert to fraction form
    723,556/998,507.28 = 401,315.44/x
  3. Step 3: Cross multiply
    723,556x = 998,507.28 × 401,315.44
  4. Step 4: Simplify right side
    723,556x = 400,716,388,416.40
  5. Step 5: Solve for x
    x = 400,716,388,416.40/723,556
  6. Step 6: Final answer
    x = 553,815.31

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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.