Home / 378,085.22-521,738.52-208,315.70

Finding the Fourth Proportional to 378,085.22, 521,738.52 and 208,315.70

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Solution

The fourth proportional to 378,085.22, 521,738.52 and 208,315.70 is: 287,465.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,085.22 : 521,738.52 = 208,315.70 : x
  2. Step 2: Convert to fraction form
    378,085.22/521,738.52 = 208,315.70/x
  3. Step 3: Cross multiply
    378,085.22x = 521,738.52 × 208,315.70
  4. Step 4: Simplify right side
    378,085.22x = 108,686,325,010.76
  5. Step 5: Solve for x
    x = 108,686,325,010.76/378,085.22
  6. Step 6: Final answer
    x = 287,465.15

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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.