Home / 378,140.16-521,844.52-208,385.20

Finding the Fourth Proportional to 378,140.16, 521,844.52 and 208,385.20

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Solution

The fourth proportional to 378,140.16, 521,844.52 and 208,385.20 is: 287,577.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,140.16 : 521,844.52 = 208,385.20 : x
  2. Step 2: Convert to fraction form
    378,140.16/521,844.52 = 208,385.20/x
  3. Step 3: Cross multiply
    378,140.16x = 521,844.52 × 208,385.20
  4. Step 4: Simplify right side
    378,140.16x = 108,744,674,669.10
  5. Step 5: Solve for x
    x = 108,744,674,669.10/378,140.16
  6. Step 6: Final answer
    x = 287,577.69

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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.