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Finding the Fourth Proportional to 1,204.68, 1,806.87 and 511.45

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Solution

The fourth proportional to 1,204.68, 1,806.87 and 511.45 is: 767.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,204.68 : 1,806.87 = 511.45 : x
  2. Step 2: Convert to fraction form
    1,204.68/1,806.87 = 511.45/x
  3. Step 3: Cross multiply
    1,204.68x = 1,806.87 × 511.45
  4. Step 4: Simplify right side
    1,204.68x = 924,123.66
  5. Step 5: Solve for x
    x = 924,123.66/1,204.68
  6. Step 6: Final answer
    x = 767.11

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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.