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Finding the Fourth Proportional to 1,284.17, 1,925.69 and 514.13

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Solution

The fourth proportional to 1,284.17, 1,925.69 and 514.13 is: 770.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.17 : 1,925.69 = 514.13 : x
  2. Step 2: Convert to fraction form
    1,284.17/1,925.69 = 514.13/x
  3. Step 3: Cross multiply
    1,284.17x = 1,925.69 × 514.13
  4. Step 4: Simplify right side
    1,284.17x = 990,042.80
  5. Step 5: Solve for x
    x = 990,042.80/1,284.17
  6. Step 6: Final answer
    x = 770.96

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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.