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Finding the Fourth Proportional to 753.71, 1,130.60 and 205.91

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Solution

The fourth proportional to 753.71, 1,130.60 and 205.91 is: 308.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.71 : 1,130.60 = 205.91 : x
  2. Step 2: Convert to fraction form
    753.71/1,130.60 = 205.91/x
  3. Step 3: Cross multiply
    753.71x = 1,130.60 × 205.91
  4. Step 4: Simplify right side
    753.71x = 232,795.16
  5. Step 5: Solve for x
    x = 232,795.16/753.71
  6. Step 6: Final answer
    x = 308.86

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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.