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Finding the Fourth Proportional to 5,348.60, 7,381.12 and 2,990.88

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Solution

The fourth proportional to 5,348.60, 7,381.12 and 2,990.88 is: 4,127.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,348.60 : 7,381.12 = 2,990.88 : x
  2. Step 2: Convert to fraction form
    5,348.60/7,381.12 = 2,990.88/x
  3. Step 3: Cross multiply
    5,348.60x = 7,381.12 × 2,990.88
  4. Step 4: Simplify right side
    5,348.60x = 22,076,044.19
  5. Step 5: Solve for x
    x = 22,076,044.19/5,348.60
  6. Step 6: Final answer
    x = 4,127.44

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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.