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Finding the Fourth Proportional to 1,101.96, 1,653.39 and 485.64

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Solution

The fourth proportional to 1,101.96, 1,653.39 and 485.64 is: 728.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.96 : 1,653.39 = 485.64 : x
  2. Step 2: Convert to fraction form
    1,101.96/1,653.39 = 485.64/x
  3. Step 3: Cross multiply
    1,101.96x = 1,653.39 × 485.64
  4. Step 4: Simplify right side
    1,101.96x = 802,952.32
  5. Step 5: Solve for x
    x = 802,952.32/1,101.96
  6. Step 6: Final answer
    x = 728.66

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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.