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Finding the Fourth Proportional to 803.52, 1,109.35 and 616.65

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Solution

The fourth proportional to 803.52, 1,109.35 and 616.65 is: 851.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.52 : 1,109.35 = 616.65 : x
  2. Step 2: Convert to fraction form
    803.52/1,109.35 = 616.65/x
  3. Step 3: Cross multiply
    803.52x = 1,109.35 × 616.65
  4. Step 4: Simplify right side
    803.52x = 684,080.68
  5. Step 5: Solve for x
    x = 684,080.68/803.52
  6. Step 6: Final answer
    x = 851.35

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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.