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Finding the Fourth Proportional to 554.79, 832.32 and 311.47

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Solution

The fourth proportional to 554.79, 832.32 and 311.47 is: 467.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.79 : 832.32 = 311.47 : x
  2. Step 2: Convert to fraction form
    554.79/832.32 = 311.47/x
  3. Step 3: Cross multiply
    554.79x = 832.32 × 311.47
  4. Step 4: Simplify right side
    554.79x = 259,242.71
  5. Step 5: Solve for x
    x = 259,242.71/554.79
  6. Step 6: Final answer
    x = 467.28

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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.