Home / 378,647.36-522,440.16-231,434.96

Finding the Fourth Proportional to 378,647.36, 522,440.16 and 231,434.96

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Solution

The fourth proportional to 378,647.36, 522,440.16 and 231,434.96 is: 319,323.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,647.36 : 522,440.16 = 231,434.96 : x
  2. Step 2: Convert to fraction form
    378,647.36/522,440.16 = 231,434.96/x
  3. Step 3: Cross multiply
    378,647.36x = 522,440.16 × 231,434.96
  4. Step 4: Simplify right side
    378,647.36x = 120,910,917,531.99
  5. Step 5: Solve for x
    x = 120,910,917,531.99/378,647.36
  6. Step 6: Final answer
    x = 319,323.28

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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.