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Finding the Fourth Proportional to 3,139.70, 4,706.54 and 1,164.80

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Solution

The fourth proportional to 3,139.70, 4,706.54 and 1,164.80 is: 1,746.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.70 : 4,706.54 = 1,164.80 : x
  2. Step 2: Convert to fraction form
    3,139.70/4,706.54 = 1,164.80/x
  3. Step 3: Cross multiply
    3,139.70x = 4,706.54 × 1,164.80
  4. Step 4: Simplify right side
    3,139.70x = 5,482,157.17
  5. Step 5: Solve for x
    x = 5,482,157.17/3,139.70
  6. Step 6: Final answer
    x = 1,746.08

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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.