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Finding the Fourth Proportional to 352.81, 487.18 and 313.93

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Solution

The fourth proportional to 352.81, 487.18 and 313.93 is: 433.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.81 : 487.18 = 313.93 : x
  2. Step 2: Convert to fraction form
    352.81/487.18 = 313.93/x
  3. Step 3: Cross multiply
    352.81x = 487.18 × 313.93
  4. Step 4: Simplify right side
    352.81x = 152,940.42
  5. Step 5: Solve for x
    x = 152,940.42/352.81
  6. Step 6: Final answer
    x = 433.49

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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.