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Finding the Fourth Proportional to 6,490.80, 8,957.40 and 3,696.24

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Solution

The fourth proportional to 6,490.80, 8,957.40 and 3,696.24 is: 5,100.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,490.80 : 8,957.40 = 3,696.24 : x
  2. Step 2: Convert to fraction form
    6,490.80/8,957.40 = 3,696.24/x
  3. Step 3: Cross multiply
    6,490.80x = 8,957.40 × 3,696.24
  4. Step 4: Simplify right side
    6,490.80x = 33,108,700.18
  5. Step 5: Solve for x
    x = 33,108,700.18/6,490.80
  6. Step 6: Final answer
    x = 5,100.87

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.