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Finding the Fourth Proportional to 949.79, 1,424.95 and 325.22

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Solution

The fourth proportional to 949.79, 1,424.95 and 325.22 is: 487.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.79 : 1,424.95 = 325.22 : x
  2. Step 2: Convert to fraction form
    949.79/1,424.95 = 325.22/x
  3. Step 3: Cross multiply
    949.79x = 1,424.95 × 325.22
  4. Step 4: Simplify right side
    949.79x = 463,426.16
  5. Step 5: Solve for x
    x = 463,426.16/949.79
  6. Step 6: Final answer
    x = 487.93

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Double scale
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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.