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Finding the Fourth Proportional to 688.04, 948.66 and 480.68

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Solution

The fourth proportional to 688.04, 948.66 and 480.68 is: 662.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.04 : 948.66 = 480.68 : x
  2. Step 2: Convert to fraction form
    688.04/948.66 = 480.68/x
  3. Step 3: Cross multiply
    688.04x = 948.66 × 480.68
  4. Step 4: Simplify right side
    688.04x = 456,001.89
  5. Step 5: Solve for x
    x = 456,001.89/688.04
  6. Step 6: Final answer
    x = 662.75

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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.