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Finding the Fourth Proportional to 561.35, 841.12 and 445.17

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Solution

The fourth proportional to 561.35, 841.12 and 445.17 is: 667.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.35 : 841.12 = 445.17 : x
  2. Step 2: Convert to fraction form
    561.35/841.12 = 445.17/x
  3. Step 3: Cross multiply
    561.35x = 841.12 × 445.17
  4. Step 4: Simplify right side
    561.35x = 374,443.43
  5. Step 5: Solve for x
    x = 374,443.43/561.35
  6. Step 6: Final answer
    x = 667.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.