Home / 723,789.78-998,749.28-401,419.10

Finding the Fourth Proportional to 723,789.78, 998,749.28 and 401,419.10

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Solution

The fourth proportional to 723,789.78, 998,749.28 and 401,419.10 is: 553,913.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,789.78 : 998,749.28 = 401,419.10 : x
  2. Step 2: Convert to fraction form
    723,789.78/998,749.28 = 401,419.10/x
  3. Step 3: Cross multiply
    723,789.78x = 998,749.28 × 401,419.10
  4. Step 4: Simplify right side
    723,789.78x = 400,917,037,103.25
  5. Step 5: Solve for x
    x = 400,917,037,103.25/723,789.78
  6. Step 6: Final answer
    x = 553,913.65

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Similar ratio
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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.