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Finding the Fourth Proportional to 400.52, 554.08 and 385.34

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Solution

The fourth proportional to 400.52, 554.08 and 385.34 is: 533.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.52 : 554.08 = 385.34 : x
  2. Step 2: Convert to fraction form
    400.52/554.08 = 385.34/x
  3. Step 3: Cross multiply
    400.52x = 554.08 × 385.34
  4. Step 4: Simplify right side
    400.52x = 213,509.19
  5. Step 5: Solve for x
    x = 213,509.19/400.52
  6. Step 6: Final answer
    x = 533.08

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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.