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Finding the Fourth Proportional to 4,921.30, 7,369.80 and 4,702.60

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Solution

The fourth proportional to 4,921.30, 7,369.80 and 4,702.60 is: 7,042.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,921.30 : 7,369.80 = 4,702.60 : x
  2. Step 2: Convert to fraction form
    4,921.30/7,369.80 = 4,702.60/x
  3. Step 3: Cross multiply
    4,921.30x = 7,369.80 × 4,702.60
  4. Step 4: Simplify right side
    4,921.30x = 34,657,221.48
  5. Step 5: Solve for x
    x = 34,657,221.48/4,921.30
  6. Step 6: Final answer
    x = 7,042.29

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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.