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Finding the Fourth Proportional to 655,997.32, 905,317.86 and 380,411.56

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Solution

The fourth proportional to 655,997.32, 905,317.86 and 380,411.56 is: 524,992.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,997.32 : 905,317.86 = 380,411.56 : x
  2. Step 2: Convert to fraction form
    655,997.32/905,317.86 = 380,411.56/x
  3. Step 3: Cross multiply
    655,997.32x = 905,317.86 × 380,411.56
  4. Step 4: Simplify right side
    655,997.32x = 344,393,379,418.46
  5. Step 5: Solve for x
    x = 344,393,379,418.46/655,997.32
  6. Step 6: Final answer
    x = 524,992.05

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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.