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Finding the Fourth Proportional to 1,005.44, 1,386.56 and 695.04

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Solution

The fourth proportional to 1,005.44, 1,386.56 and 695.04 is: 958.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005.44 : 1,386.56 = 695.04 : x
  2. Step 2: Convert to fraction form
    1,005.44/1,386.56 = 695.04/x
  3. Step 3: Cross multiply
    1,005.44x = 1,386.56 × 695.04
  4. Step 4: Simplify right side
    1,005.44x = 963,714.66
  5. Step 5: Solve for x
    x = 963,714.66/1,005.44
  6. Step 6: Final answer
    x = 958.50

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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.