Home / 378,919.08-522,912.60-209,153.16

Finding the Fourth Proportional to 378,919.08, 522,912.60 and 209,153.16

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Solution

The fourth proportional to 378,919.08, 522,912.60 and 209,153.16 is: 288,633.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,919.08 : 522,912.60 = 209,153.16 : x
  2. Step 2: Convert to fraction form
    378,919.08/522,912.60 = 209,153.16/x
  3. Step 3: Cross multiply
    378,919.08x = 522,912.60 × 209,153.16
  4. Step 4: Simplify right side
    378,919.08x = 109,368,822,693.82
  5. Step 5: Solve for x
    x = 109,368,822,693.82/378,919.08
  6. Step 6: Final answer
    x = 288,633.72

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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.