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Finding the Fourth Proportional to 480.47, 721.31 and 412.43

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Solution

The fourth proportional to 480.47, 721.31 and 412.43 is: 619.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.47 : 721.31 = 412.43 : x
  2. Step 2: Convert to fraction form
    480.47/721.31 = 412.43/x
  3. Step 3: Cross multiply
    480.47x = 721.31 × 412.43
  4. Step 4: Simplify right side
    480.47x = 297,484.21
  5. Step 5: Solve for x
    x = 297,484.21/480.47
  6. Step 6: Final answer
    x = 619.16

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1.5x scale

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.