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Finding the Fourth Proportional to 485,401.21, 669,705.22 and 281,411.41

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Solution

The fourth proportional to 485,401.21, 669,705.22 and 281,411.41 is: 388,261.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,401.21 : 669,705.22 = 281,411.41 : x
  2. Step 2: Convert to fraction form
    485,401.21/669,705.22 = 281,411.41/x
  3. Step 3: Cross multiply
    485,401.21x = 669,705.22 × 281,411.41
  4. Step 4: Simplify right side
    485,401.21x = 188,462,690,244.56
  5. Step 5: Solve for x
    x = 188,462,690,244.56/485,401.21
  6. Step 6: Final answer
    x = 388,261.68

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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.