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Finding the Fourth Proportional to 1,702.55, 2,551.80 and 1,528.40

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Solution

The fourth proportional to 1,702.55, 2,551.80 and 1,528.40 is: 2,290.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,702.55 : 2,551.80 = 1,528.40 : x
  2. Step 2: Convert to fraction form
    1,702.55/2,551.80 = 1,528.40/x
  3. Step 3: Cross multiply
    1,702.55x = 2,551.80 × 1,528.40
  4. Step 4: Simplify right side
    1,702.55x = 3,900,171.12
  5. Step 5: Solve for x
    x = 3,900,171.12/1,702.55
  6. Step 6: Final answer
    x = 2,290.78

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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.