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Finding the Fourth Proportional to 319.50, 440.92 and 188.51

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Solution

The fourth proportional to 319.50, 440.92 and 188.51 is: 260.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.50 : 440.92 = 188.51 : x
  2. Step 2: Convert to fraction form
    319.50/440.92 = 188.51/x
  3. Step 3: Cross multiply
    319.50x = 440.92 × 188.51
  4. Step 4: Simplify right side
    319.50x = 83,117.81
  5. Step 5: Solve for x
    x = 83,117.81/319.50
  6. Step 6: Final answer
    x = 260.15

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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.