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Finding the Fourth Proportional to 440.13, 607.38 and 243.63

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Solution

The fourth proportional to 440.13, 607.38 and 243.63 is: 336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.13 : 607.38 = 243.63 : x
  2. Step 2: Convert to fraction form
    440.13/607.38 = 243.63/x
  3. Step 3: Cross multiply
    440.13x = 607.38 × 243.63
  4. Step 4: Simplify right side
    440.13x = 147,975.99
  5. Step 5: Solve for x
    x = 147,975.99/440.13
  6. Step 6: Final answer
    x = 336.21

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Double scale
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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.