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Finding the Fourth Proportional to 319.10, 478.72 and 124.10

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Solution

The fourth proportional to 319.10, 478.72 and 124.10 is: 186.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.10 : 478.72 = 124.10 : x
  2. Step 2: Convert to fraction form
    319.10/478.72 = 124.10/x
  3. Step 3: Cross multiply
    319.10x = 478.72 × 124.10
  4. Step 4: Simplify right side
    319.10x = 59,409.15
  5. Step 5: Solve for x
    x = 59,409.15/319.10
  6. Step 6: Final answer
    x = 186.18

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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.