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Finding the Fourth Proportional to 2,783.60, 4,175.40 and 731.60

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Solution

The fourth proportional to 2,783.60, 4,175.40 and 731.60 is: 1,097.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,783.60 : 4,175.40 = 731.60 : x
  2. Step 2: Convert to fraction form
    2,783.60/4,175.40 = 731.60/x
  3. Step 3: Cross multiply
    2,783.60x = 4,175.40 × 731.60
  4. Step 4: Simplify right side
    2,783.60x = 3,054,722.64
  5. Step 5: Solve for x
    x = 3,054,722.64/2,783.60
  6. Step 6: Final answer
    x = 1,097.40

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1.5x scale

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.