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Finding the Fourth Proportional to 480.47, 663.11 and 312.36

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Solution

The fourth proportional to 480.47, 663.11 and 312.36 is: 431.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.47 : 663.11 = 312.36 : x
  2. Step 2: Convert to fraction form
    480.47/663.11 = 312.36/x
  3. Step 3: Cross multiply
    480.47x = 663.11 × 312.36
  4. Step 4: Simplify right side
    480.47x = 207,127.48
  5. Step 5: Solve for x
    x = 207,127.48/480.47
  6. Step 6: Final answer
    x = 431.10

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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.