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Finding the Fourth Proportional to 1,551.88, 2,328.05 and 511.54

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Solution

The fourth proportional to 1,551.88, 2,328.05 and 511.54 is: 767.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.88 : 2,328.05 = 511.54 : x
  2. Step 2: Convert to fraction form
    1,551.88/2,328.05 = 511.54/x
  3. Step 3: Cross multiply
    1,551.88x = 2,328.05 × 511.54
  4. Step 4: Simplify right side
    1,551.88x = 1,190,890.70
  5. Step 5: Solve for x
    x = 1,190,890.70/1,551.88
  6. Step 6: Final answer
    x = 767.39

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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.