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Finding the Fourth Proportional to 1,051.12, 1,449.76 and 696.32

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Solution

The fourth proportional to 1,051.12, 1,449.76 and 696.32 is: 960.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.12 : 1,449.76 = 696.32 : x
  2. Step 2: Convert to fraction form
    1,051.12/1,449.76 = 696.32/x
  3. Step 3: Cross multiply
    1,051.12x = 1,449.76 × 696.32
  4. Step 4: Simplify right side
    1,051.12x = 1,009,496.88
  5. Step 5: Solve for x
    x = 1,009,496.88/1,051.12
  6. Step 6: Final answer
    x = 960.40

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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.