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Finding the Fourth Proportional to 1,632.42, 2,448.66 and 478.20

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Solution

The fourth proportional to 1,632.42, 2,448.66 and 478.20 is: 717.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,632.42 : 2,448.66 = 478.20 : x
  2. Step 2: Convert to fraction form
    1,632.42/2,448.66 = 478.20/x
  3. Step 3: Cross multiply
    1,632.42x = 2,448.66 × 478.20
  4. Step 4: Simplify right side
    1,632.42x = 1,170,949.21
  5. Step 5: Solve for x
    x = 1,170,949.21/1,632.42
  6. Step 6: Final answer
    x = 717.31

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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.