Home / 378,911.13-522,897.40-209,145.30

Finding the Fourth Proportional to 378,911.13, 522,897.40 and 209,145.30

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Solution

The fourth proportional to 378,911.13, 522,897.40 and 209,145.30 is: 288,620.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,911.13 : 522,897.40 = 209,145.30 : x
  2. Step 2: Convert to fraction form
    378,911.13/522,897.40 = 209,145.30/x
  3. Step 3: Cross multiply
    378,911.13x = 522,897.40 × 209,145.30
  4. Step 4: Simplify right side
    378,911.13x = 109,361,533,592.22
  5. Step 5: Solve for x
    x = 109,361,533,592.22/378,911.13
  6. Step 6: Final answer
    x = 288,620.54

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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.