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Finding the Fourth Proportional to 555.53, 832.48 and 312.12

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Solution

The fourth proportional to 555.53, 832.48 and 312.12 is: 467.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.53 : 832.48 = 312.12 : x
  2. Step 2: Convert to fraction form
    555.53/832.48 = 312.12/x
  3. Step 3: Cross multiply
    555.53x = 832.48 × 312.12
  4. Step 4: Simplify right side
    555.53x = 259,832.88
  5. Step 5: Solve for x
    x = 259,832.88/555.53
  6. Step 6: Final answer
    x = 467.72

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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.