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Finding the Fourth Proportional to 1,309.55, 1,963.82 and 529.41

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Solution

The fourth proportional to 1,309.55, 1,963.82 and 529.41 is: 793.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.55 : 1,963.82 = 529.41 : x
  2. Step 2: Convert to fraction form
    1,309.55/1,963.82 = 529.41/x
  3. Step 3: Cross multiply
    1,309.55x = 1,963.82 × 529.41
  4. Step 4: Simplify right side
    1,309.55x = 1,039,653.48
  5. Step 5: Solve for x
    x = 1,039,653.48/1,309.55
  6. Step 6: Final answer
    x = 793.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.