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Finding the Fourth Proportional to 5,348.70, 7,381.35 and 2,990.70

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Solution

The fourth proportional to 5,348.70, 7,381.35 and 2,990.70 is: 4,127.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,348.70 : 7,381.35 = 2,990.70 : x
  2. Step 2: Convert to fraction form
    5,348.70/7,381.35 = 2,990.70/x
  3. Step 3: Cross multiply
    5,348.70x = 7,381.35 × 2,990.70
  4. Step 4: Simplify right side
    5,348.70x = 22,075,403.45
  5. Step 5: Solve for x
    x = 22,075,403.45/5,348.70
  6. Step 6: Final answer
    x = 4,127.25

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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.