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Finding the Fourth Proportional to 955.62, 1,319.76 and 806.58

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Solution

The fourth proportional to 955.62, 1,319.76 and 806.58 is: 1,113.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.62 : 1,319.76 = 806.58 : x
  2. Step 2: Convert to fraction form
    955.62/1,319.76 = 806.58/x
  3. Step 3: Cross multiply
    955.62x = 1,319.76 × 806.58
  4. Step 4: Simplify right side
    955.62x = 1,064,492.02
  5. Step 5: Solve for x
    x = 1,064,492.02/955.62
  6. Step 6: Final answer
    x = 1,113.93

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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.