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Finding the Fourth Proportional to 420.06, 630.12 and 173.16

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Solution

The fourth proportional to 420.06, 630.12 and 173.16 is: 259.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.06 : 630.12 = 173.16 : x
  2. Step 2: Convert to fraction form
    420.06/630.12 = 173.16/x
  3. Step 3: Cross multiply
    420.06x = 630.12 × 173.16
  4. Step 4: Simplify right side
    420.06x = 109,111.58
  5. Step 5: Solve for x
    x = 109,111.58/420.06
  6. Step 6: Final answer
    x = 259.75

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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.