Home / 378,973.80-522,970.12-209,204.28

Finding the Fourth Proportional to 378,973.80, 522,970.12 and 209,204.28

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Solution

The fourth proportional to 378,973.80, 522,970.12 and 209,204.28 is: 288,694.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,973.80 : 522,970.12 = 209,204.28 : x
  2. Step 2: Convert to fraction form
    378,973.80/522,970.12 = 209,204.28/x
  3. Step 3: Cross multiply
    378,973.80x = 522,970.12 × 209,204.28
  4. Step 4: Simplify right side
    378,973.80x = 109,407,587,416.11
  5. Step 5: Solve for x
    x = 109,407,587,416.11/378,973.80
  6. Step 6: Final answer
    x = 288,694.33

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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.