Home / 378,145.63-521,852.10-208,390.69

Finding the Fourth Proportional to 378,145.63, 521,852.10 and 208,390.69

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Solution

The fourth proportional to 378,145.63, 521,852.10 and 208,390.69 is: 287,585.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,145.63 : 521,852.10 = 208,390.69 : x
  2. Step 2: Convert to fraction form
    378,145.63/521,852.10 = 208,390.69/x
  3. Step 3: Cross multiply
    378,145.63x = 521,852.10 × 208,390.69
  4. Step 4: Simplify right side
    378,145.63x = 108,749,116,587.69
  5. Step 5: Solve for x
    x = 108,749,116,587.69/378,145.63
  6. Step 6: Final answer
    x = 287,585.28

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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.