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Finding the Fourth Proportional to 1,702.60, 2,556.60 and 1,157.20

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Solution

The fourth proportional to 1,702.60, 2,556.60 and 1,157.20 is: 1,737.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,702.60 : 2,556.60 = 1,157.20 : x
  2. Step 2: Convert to fraction form
    1,702.60/2,556.60 = 1,157.20/x
  3. Step 3: Cross multiply
    1,702.60x = 2,556.60 × 1,157.20
  4. Step 4: Simplify right side
    1,702.60x = 2,958,497.52
  5. Step 5: Solve for x
    x = 2,958,497.52/1,702.60
  6. Step 6: Final answer
    x = 1,737.64

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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.