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Finding the Fourth Proportional to 808.91, 1,116.66 and 529.15

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Solution

The fourth proportional to 808.91, 1,116.66 and 529.15 is: 730.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.91 : 1,116.66 = 529.15 : x
  2. Step 2: Convert to fraction form
    808.91/1,116.66 = 529.15/x
  3. Step 3: Cross multiply
    808.91x = 1,116.66 × 529.15
  4. Step 4: Simplify right side
    808.91x = 590,880.64
  5. Step 5: Solve for x
    x = 590,880.64/808.91
  6. Step 6: Final answer
    x = 730.47

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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.