Home / 378,973.27-522,979.90-209,203.75

Finding the Fourth Proportional to 378,973.27, 522,979.90 and 209,203.75

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Solution

The fourth proportional to 378,973.27, 522,979.90 and 209,203.75 is: 288,699.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,973.27 : 522,979.90 = 209,203.75 : x
  2. Step 2: Convert to fraction form
    378,973.27/522,979.90 = 209,203.75/x
  3. Step 3: Cross multiply
    378,973.27x = 522,979.90 × 209,203.75
  4. Step 4: Simplify right side
    378,973.27x = 109,409,356,254.63
  5. Step 5: Solve for x
    x = 109,409,356,254.63/378,973.27
  6. Step 6: Final answer
    x = 288,699.40

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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.