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Finding the Fourth Proportional to 1,282.63, 1,920.45 and 1,007.13

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Solution

The fourth proportional to 1,282.63, 1,920.45 and 1,007.13 is: 1,507.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.63 : 1,920.45 = 1,007.13 : x
  2. Step 2: Convert to fraction form
    1,282.63/1,920.45 = 1,007.13/x
  3. Step 3: Cross multiply
    1,282.63x = 1,920.45 × 1,007.13
  4. Step 4: Simplify right side
    1,282.63x = 1,934,142.81
  5. Step 5: Solve for x
    x = 1,934,142.81/1,282.63
  6. Step 6: Final answer
    x = 1,507.95

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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.