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Finding the Fourth Proportional to 5,274.40, 7,280.40 and 3,702.88

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Solution

The fourth proportional to 5,274.40, 7,280.40 and 3,702.88 is: 5,111.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,274.40 : 7,280.40 = 3,702.88 : x
  2. Step 2: Convert to fraction form
    5,274.40/7,280.40 = 3,702.88/x
  3. Step 3: Cross multiply
    5,274.40x = 7,280.40 × 3,702.88
  4. Step 4: Simplify right side
    5,274.40x = 26,958,447.55
  5. Step 5: Solve for x
    x = 26,958,447.55/5,274.40
  6. Step 6: Final answer
    x = 5,111.19

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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.