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Finding the Fourth Proportional to 556.54, 835.01 and 209.91

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Solution

The fourth proportional to 556.54, 835.01 and 209.91 is: 314.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.54 : 835.01 = 209.91 : x
  2. Step 2: Convert to fraction form
    556.54/835.01 = 209.91/x
  3. Step 3: Cross multiply
    556.54x = 835.01 × 209.91
  4. Step 4: Simplify right side
    556.54x = 175,276.95
  5. Step 5: Solve for x
    x = 175,276.95/556.54
  6. Step 6: Final answer
    x = 314.94

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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.