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Finding the Fourth Proportional to 797.58, 1,189.57 and 783.74

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Solution

The fourth proportional to 797.58, 1,189.57 and 783.74 is: 1,168.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.58 : 1,189.57 = 783.74 : x
  2. Step 2: Convert to fraction form
    797.58/1,189.57 = 783.74/x
  3. Step 3: Cross multiply
    797.58x = 1,189.57 × 783.74
  4. Step 4: Simplify right side
    797.58x = 932,313.59
  5. Step 5: Solve for x
    x = 932,313.59/797.58
  6. Step 6: Final answer
    x = 1,168.93

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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.