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Finding the Fourth Proportional to 1,283.54, 1,925.31 and 514.58

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Solution

The fourth proportional to 1,283.54, 1,925.31 and 514.58 is: 771.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283.54 : 1,925.31 = 514.58 : x
  2. Step 2: Convert to fraction form
    1,283.54/1,925.31 = 514.58/x
  3. Step 3: Cross multiply
    1,283.54x = 1,925.31 × 514.58
  4. Step 4: Simplify right side
    1,283.54x = 990,726.02
  5. Step 5: Solve for x
    x = 990,726.02/1,283.54
  6. Step 6: Final answer
    x = 771.87

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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.