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Finding the Fourth Proportional to 477.68, 713.50 and 423.92

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Solution

The fourth proportional to 477.68, 713.50 and 423.92 is: 633.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.68 : 713.50 = 423.92 : x
  2. Step 2: Convert to fraction form
    477.68/713.50 = 423.92/x
  3. Step 3: Cross multiply
    477.68x = 713.50 × 423.92
  4. Step 4: Simplify right side
    477.68x = 302,466.92
  5. Step 5: Solve for x
    x = 302,466.92/477.68
  6. Step 6: Final answer
    x = 633.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.