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Finding the Fourth Proportional to 823,902.78, 1,235,858.28 and 291,424.29

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Solution

The fourth proportional to 823,902.78, 1,235,858.28 and 291,424.29 is: 437,137.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    823,902.78 : 1,235,858.28 = 291,424.29 : x
  2. Step 2: Convert to fraction form
    823,902.78/1,235,858.28 = 291,424.29/x
  3. Step 3: Cross multiply
    823,902.78x = 1,235,858.28 × 291,424.29
  4. Step 4: Simplify right side
    823,902.78x = 360,159,121,789.62
  5. Step 5: Solve for x
    x = 360,159,121,789.62/823,902.78
  6. Step 6: Final answer
    x = 437,137.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.