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Finding the Fourth Proportional to 1,126.92, 1,555.02 and 684.93

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Solution

The fourth proportional to 1,126.92, 1,555.02 and 684.93 is: 945.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.92 : 1,555.02 = 684.93 : x
  2. Step 2: Convert to fraction form
    1,126.92/1,555.02 = 684.93/x
  3. Step 3: Cross multiply
    1,126.92x = 1,555.02 × 684.93
  4. Step 4: Simplify right side
    1,126.92x = 1,065,079.85
  5. Step 5: Solve for x
    x = 1,065,079.85/1,126.92
  6. Step 6: Final answer
    x = 945.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.