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Finding the Fourth Proportional to 1,284.86, 1,773.11 and 695.40

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Solution

The fourth proportional to 1,284.86, 1,773.11 and 695.40 is: 959.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.86 : 1,773.11 = 695.40 : x
  2. Step 2: Convert to fraction form
    1,284.86/1,773.11 = 695.40/x
  3. Step 3: Cross multiply
    1,284.86x = 1,773.11 × 695.40
  4. Step 4: Simplify right side
    1,284.86x = 1,233,010.63
  5. Step 5: Solve for x
    x = 1,233,010.63/1,284.86
  6. Step 6: Final answer
    x = 959.65

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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.