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Finding the Fourth Proportional to 795.64, 1,186.68 and 781.79

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Solution

The fourth proportional to 795.64, 1,186.68 and 781.79 is: 1,166.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    795.64 : 1,186.68 = 781.79 : x
  2. Step 2: Convert to fraction form
    795.64/1,186.68 = 781.79/x
  3. Step 3: Cross multiply
    795.64x = 1,186.68 × 781.79
  4. Step 4: Simplify right side
    795.64x = 927,724.71
  5. Step 5: Solve for x
    x = 927,724.71/795.64
  6. Step 6: Final answer
    x = 1,166.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.