Home / 378,082.12-521,755.14-208,315.84

Finding the Fourth Proportional to 378,082.12, 521,755.14 and 208,315.84

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Solution

The fourth proportional to 378,082.12, 521,755.14 and 208,315.84 is: 287,476.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,082.12 : 521,755.14 = 208,315.84 : x
  2. Step 2: Convert to fraction form
    378,082.12/521,755.14 = 208,315.84/x
  3. Step 3: Cross multiply
    378,082.12x = 521,755.14 × 208,315.84
  4. Step 4: Simplify right side
    378,082.12x = 108,689,860,263.42
  5. Step 5: Solve for x
    x = 108,689,860,263.42/378,082.12
  6. Step 6: Final answer
    x = 287,476.86

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1.5x scale

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.