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Finding the Fourth Proportional to 477.49, 716.29 and 423.15

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Solution

The fourth proportional to 477.49, 716.29 and 423.15 is: 634.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.49 : 716.29 = 423.15 : x
  2. Step 2: Convert to fraction form
    477.49/716.29 = 423.15/x
  3. Step 3: Cross multiply
    477.49x = 716.29 × 423.15
  4. Step 4: Simplify right side
    477.49x = 303,096.00
  5. Step 5: Solve for x
    x = 303,096.00/477.49
  6. Step 6: Final answer
    x = 634.77

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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.