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Finding the Fourth Proportional to 442.01, 662.40 and 384.90

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Solution

The fourth proportional to 442.01, 662.40 and 384.90 is: 576.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.01 : 662.40 = 384.90 : x
  2. Step 2: Convert to fraction form
    442.01/662.40 = 384.90/x
  3. Step 3: Cross multiply
    442.01x = 662.40 × 384.90
  4. Step 4: Simplify right side
    442.01x = 254,957.76
  5. Step 5: Solve for x
    x = 254,957.76/442.01
  6. Step 6: Final answer
    x = 576.82

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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.