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Finding the Fourth Proportional to 783.16, 1,080.96 and 484.52

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Solution

The fourth proportional to 783.16, 1,080.96 and 484.52 is: 668.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.16 : 1,080.96 = 484.52 : x
  2. Step 2: Convert to fraction form
    783.16/1,080.96 = 484.52/x
  3. Step 3: Cross multiply
    783.16x = 1,080.96 × 484.52
  4. Step 4: Simplify right side
    783.16x = 523,746.74
  5. Step 5: Solve for x
    x = 523,746.74/783.16
  6. Step 6: Final answer
    x = 668.76

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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.