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Finding the Fourth Proportional to 556.07, 834.22 and 209.40

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Solution

The fourth proportional to 556.07, 834.22 and 209.40 is: 314.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.07 : 834.22 = 209.40 : x
  2. Step 2: Convert to fraction form
    556.07/834.22 = 209.40/x
  3. Step 3: Cross multiply
    556.07x = 834.22 × 209.40
  4. Step 4: Simplify right side
    556.07x = 174,685.67
  5. Step 5: Solve for x
    x = 174,685.67/556.07
  6. Step 6: Final answer
    x = 314.14

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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.