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Finding the Fourth Proportional to 1,009.79, 1,512.25 and 684.17

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Solution

The fourth proportional to 1,009.79, 1,512.25 and 684.17 is: 1,024.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009.79 : 1,512.25 = 684.17 : x
  2. Step 2: Convert to fraction form
    1,009.79/1,512.25 = 684.17/x
  3. Step 3: Cross multiply
    1,009.79x = 1,512.25 × 684.17
  4. Step 4: Simplify right side
    1,009.79x = 1,034,636.08
  5. Step 5: Solve for x
    x = 1,034,636.08/1,009.79
  6. Step 6: Final answer
    x = 1,024.61

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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.