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Finding the Fourth Proportional to 809.19, 1,116.69 and 529.59

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Solution

The fourth proportional to 809.19, 1,116.69 and 529.59 is: 730.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.19 : 1,116.69 = 529.59 : x
  2. Step 2: Convert to fraction form
    809.19/1,116.69 = 529.59/x
  3. Step 3: Cross multiply
    809.19x = 1,116.69 × 529.59
  4. Step 4: Simplify right side
    809.19x = 591,387.86
  5. Step 5: Solve for x
    x = 591,387.86/809.19
  6. Step 6: Final answer
    x = 730.84

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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.