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Finding the Fourth Proportional to 561.34, 841.86 and 214.70

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Solution

The fourth proportional to 561.34, 841.86 and 214.70 is: 321.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.34 : 841.86 = 214.70 : x
  2. Step 2: Convert to fraction form
    561.34/841.86 = 214.70/x
  3. Step 3: Cross multiply
    561.34x = 841.86 × 214.70
  4. Step 4: Simplify right side
    561.34x = 180,747.34
  5. Step 5: Solve for x
    x = 180,747.34/561.34
  6. Step 6: Final answer
    x = 321.99

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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.