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Finding the Fourth Proportional to 796.32, 1,098.96 and 485.76

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Solution

The fourth proportional to 796.32, 1,098.96 and 485.76 is: 670.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    796.32 : 1,098.96 = 485.76 : x
  2. Step 2: Convert to fraction form
    796.32/1,098.96 = 485.76/x
  3. Step 3: Cross multiply
    796.32x = 1,098.96 × 485.76
  4. Step 4: Simplify right side
    796.32x = 533,830.81
  5. Step 5: Solve for x
    x = 533,830.81/796.32
  6. Step 6: Final answer
    x = 670.37

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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.