Home / 378,071.56-521,714.75-208,305.69

Finding the Fourth Proportional to 378,071.56, 521,714.75 and 208,305.69

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Solution

The fourth proportional to 378,071.56, 521,714.75 and 208,305.69 is: 287,448.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,071.56 : 521,714.75 = 208,305.69 : x
  2. Step 2: Convert to fraction form
    378,071.56/521,714.75 = 208,305.69/x
  3. Step 3: Cross multiply
    378,071.56x = 521,714.75 × 208,305.69
  4. Step 4: Simplify right side
    378,071.56x = 108,676,150,981.93
  5. Step 5: Solve for x
    x = 108,676,150,981.93/378,071.56
  6. Step 6: Final answer
    x = 287,448.63

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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.