Home / 378,178.40-521,886.20-208,412.52

Finding the Fourth Proportional to 378,178.40, 521,886.20 and 208,412.52

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Solution

The fourth proportional to 378,178.40, 521,886.20 and 208,412.52 is: 287,609.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,178.40 : 521,886.20 = 208,412.52 : x
  2. Step 2: Convert to fraction form
    378,178.40/521,886.20 = 208,412.52/x
  3. Step 3: Cross multiply
    378,178.40x = 521,886.20 × 208,412.52
  4. Step 4: Simplify right side
    378,178.40x = 108,767,618,095.22
  5. Step 5: Solve for x
    x = 108,767,618,095.22/378,178.40
  6. Step 6: Final answer
    x = 287,609.28

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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.