Home / 378,136.14-521,839.02-208,381.20

Finding the Fourth Proportional to 378,136.14, 521,839.02 and 208,381.20

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Solution

The fourth proportional to 378,136.14, 521,839.02 and 208,381.20 is: 287,572.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,136.14 : 521,839.02 = 208,381.20 : x
  2. Step 2: Convert to fraction form
    378,136.14/521,839.02 = 208,381.20/x
  3. Step 3: Cross multiply
    378,136.14x = 521,839.02 × 208,381.20
  4. Step 4: Simplify right side
    378,136.14x = 108,741,441,194.42
  5. Step 5: Solve for x
    x = 108,741,441,194.42/378,136.14
  6. Step 6: Final answer
    x = 287,572.20

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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.