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Finding the Fourth Proportional to 556.86, 834.61 and 312.88

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Solution

The fourth proportional to 556.86, 834.61 and 312.88 is: 468.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.86 : 834.61 = 312.88 : x
  2. Step 2: Convert to fraction form
    556.86/834.61 = 312.88/x
  3. Step 3: Cross multiply
    556.86x = 834.61 × 312.88
  4. Step 4: Simplify right side
    556.86x = 261,128.60
  5. Step 5: Solve for x
    x = 261,128.60/556.86
  6. Step 6: Final answer
    x = 468.93

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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.