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Finding the Fourth Proportional to 3,557.44, 4,908.81 and 1,985.60

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Solution

The fourth proportional to 3,557.44, 4,908.81 and 1,985.60 is: 2,739.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,557.44 : 4,908.81 = 1,985.60 : x
  2. Step 2: Convert to fraction form
    3,557.44/4,908.81 = 1,985.60/x
  3. Step 3: Cross multiply
    3,557.44x = 4,908.81 × 1,985.60
  4. Step 4: Simplify right side
    3,557.44x = 9,746,903.63
  5. Step 5: Solve for x
    x = 9,746,903.63/3,557.44
  6. Step 6: Final answer
    x = 2,739.87

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1.5x scale

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.