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Finding the Fourth Proportional to 554.32, 764.12 and 455.91

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Solution

The fourth proportional to 554.32, 764.12 and 455.91 is: 628.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.32 : 764.12 = 455.91 : x
  2. Step 2: Convert to fraction form
    554.32/764.12 = 455.91/x
  3. Step 3: Cross multiply
    554.32x = 764.12 × 455.91
  4. Step 4: Simplify right side
    554.32x = 348,369.95
  5. Step 5: Solve for x
    x = 348,369.95/554.32
  6. Step 6: Final answer
    x = 628.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.