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Finding the Fourth Proportional to 442.16, 662.34 and 210.35

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Solution

The fourth proportional to 442.16, 662.34 and 210.35 is: 315.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.16 : 662.34 = 210.35 : x
  2. Step 2: Convert to fraction form
    442.16/662.34 = 210.35/x
  3. Step 3: Cross multiply
    442.16x = 662.34 × 210.35
  4. Step 4: Simplify right side
    442.16x = 139,325.66
  5. Step 5: Solve for x
    x = 139,325.66/442.16
  6. Step 6: Final answer
    x = 315.10

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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.