Home / 378,639.36-522,429.12-231,426.96

Finding the Fourth Proportional to 378,639.36, 522,429.12 and 231,426.96

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Solution

The fourth proportional to 378,639.36, 522,429.12 and 231,426.96 is: 319,312.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,639.36 : 522,429.12 = 231,426.96 : x
  2. Step 2: Convert to fraction form
    378,639.36/522,429.12 = 231,426.96/x
  3. Step 3: Cross multiply
    378,639.36x = 522,429.12 × 231,426.96
  4. Step 4: Simplify right side
    378,639.36x = 120,904,183,057.08
  5. Step 5: Solve for x
    x = 120,904,183,057.08/378,639.36
  6. Step 6: Final answer
    x = 319,312.24

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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.