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Finding the Fourth Proportional to 1,655.70, 2,280.84 and 1,553.64

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Solution

The fourth proportional to 1,655.70, 2,280.84 and 1,553.64 is: 2,140.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,655.70 : 2,280.84 = 1,553.64 : x
  2. Step 2: Convert to fraction form
    1,655.70/2,280.84 = 1,553.64/x
  3. Step 3: Cross multiply
    1,655.70x = 2,280.84 × 1,553.64
  4. Step 4: Simplify right side
    1,655.70x = 3,543,604.26
  5. Step 5: Solve for x
    x = 3,543,604.26/1,655.70
  6. Step 6: Final answer
    x = 2,140.25

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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.