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Finding the Fourth Proportional to 556.74, 834.36 and 312.90

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Solution

The fourth proportional to 556.74, 834.36 and 312.90 is: 468.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.74 : 834.36 = 312.90 : x
  2. Step 2: Convert to fraction form
    556.74/834.36 = 312.90/x
  3. Step 3: Cross multiply
    556.74x = 834.36 × 312.90
  4. Step 4: Simplify right side
    556.74x = 261,071.24
  5. Step 5: Solve for x
    x = 261,071.24/556.74
  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.