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Finding the Fourth Proportional to 1,801.60, 2,705.10 and 1,256.20

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Solution

The fourth proportional to 1,801.60, 2,705.10 and 1,256.20 is: 1,886.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,801.60 : 2,705.10 = 1,256.20 : x
  2. Step 2: Convert to fraction form
    1,801.60/2,705.10 = 1,256.20/x
  3. Step 3: Cross multiply
    1,801.60x = 2,705.10 × 1,256.20
  4. Step 4: Simplify right side
    1,801.60x = 3,398,146.62
  5. Step 5: Solve for x
    x = 3,398,146.62/1,801.60
  6. Step 6: Final answer
    x = 1,886.18

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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.