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Finding the Fourth Proportional to 723,268.60, 998,142.28 and 400,958.24

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Solution

The fourth proportional to 723,268.60, 998,142.28 and 400,958.24 is: 553,339.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,268.60 : 998,142.28 = 400,958.24 : x
  2. Step 2: Convert to fraction form
    723,268.60/998,142.28 = 400,958.24/x
  3. Step 3: Cross multiply
    723,268.60x = 998,142.28 × 400,958.24
  4. Step 4: Simplify right side
    723,268.60x = 400,213,371,858.39
  5. Step 5: Solve for x
    x = 400,213,371,858.39/723,268.60
  6. Step 6: Final answer
    x = 553,339.90

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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.