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Finding the Fourth Proportional to 1,146.84, 1,709.64 and 1,129.08

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Solution

The fourth proportional to 1,146.84, 1,709.64 and 1,129.08 is: 1,683.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.84 : 1,709.64 = 1,129.08 : x
  2. Step 2: Convert to fraction form
    1,146.84/1,709.64 = 1,129.08/x
  3. Step 3: Cross multiply
    1,146.84x = 1,709.64 × 1,129.08
  4. Step 4: Simplify right side
    1,146.84x = 1,930,320.33
  5. Step 5: Solve for x
    x = 1,930,320.33/1,146.84
  6. Step 6: Final answer
    x = 1,683.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.