Home / 378,918.91-522,870.87-209,142.10

Finding the Fourth Proportional to 378,918.91, 522,870.87 and 209,142.10

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Solution

The fourth proportional to 378,918.91, 522,870.87 and 209,142.10 is: 288,595.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,918.91 : 522,870.87 = 209,142.10 : x
  2. Step 2: Convert to fraction form
    378,918.91/522,870.87 = 209,142.10/x
  3. Step 3: Cross multiply
    378,918.91x = 522,870.87 × 209,142.10
  4. Step 4: Simplify right side
    378,918.91x = 109,354,311,780.63
  5. Step 5: Solve for x
    x = 109,354,311,780.63/378,918.91
  6. Step 6: Final answer
    x = 288,595.55

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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.