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Finding the Fourth Proportional to 784.60, 1,083.61 and 535.48

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Solution

The fourth proportional to 784.60, 1,083.61 and 535.48 is: 739.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.60 : 1,083.61 = 535.48 : x
  2. Step 2: Convert to fraction form
    784.60/1,083.61 = 535.48/x
  3. Step 3: Cross multiply
    784.60x = 1,083.61 × 535.48
  4. Step 4: Simplify right side
    784.60x = 580,246.06
  5. Step 5: Solve for x
    x = 580,246.06/784.60
  6. Step 6: Final answer
    x = 739.55

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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.