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Finding the Fourth Proportional to 663,741.21, 915,961.17 and 361,935.21

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Solution

The fourth proportional to 663,741.21, 915,961.17 and 361,935.21 is: 499,469.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,741.21 : 915,961.17 = 361,935.21 : x
  2. Step 2: Convert to fraction form
    663,741.21/915,961.17 = 361,935.21/x
  3. Step 3: Cross multiply
    663,741.21x = 915,961.17 × 361,935.21
  4. Step 4: Simplify right side
    663,741.21x = 331,518,598,415.80
  5. Step 5: Solve for x
    x = 331,518,598,415.80/663,741.21
  6. Step 6: Final answer
    x = 499,469.66

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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.