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Finding the Fourth Proportional to 680,082.30, 938,475.99 and 378,256.86

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Solution

The fourth proportional to 680,082.30, 938,475.99 and 378,256.86 is: 521,973.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,082.30 : 938,475.99 = 378,256.86 : x
  2. Step 2: Convert to fraction form
    680,082.30/938,475.99 = 378,256.86/x
  3. Step 3: Cross multiply
    680,082.30x = 938,475.99 × 378,256.86
  4. Step 4: Simplify right side
    680,082.30x = 354,984,981,162.79
  5. Step 5: Solve for x
    x = 354,984,981,162.79/680,082.30
  6. Step 6: Final answer
    x = 521,973.56

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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.