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Finding the Fourth Proportional to 1,894.37, 2,840.90 and 724.70

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Solution

The fourth proportional to 1,894.37, 2,840.90 and 724.70 is: 1,086.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,894.37 : 2,840.90 = 724.70 : x
  2. Step 2: Convert to fraction form
    1,894.37/2,840.90 = 724.70/x
  3. Step 3: Cross multiply
    1,894.37x = 2,840.90 × 724.70
  4. Step 4: Simplify right side
    1,894.37x = 2,058,803.71
  5. Step 5: Solve for x
    x = 2,058,803.71/1,894.37
  6. Step 6: Final answer
    x = 1,086.80

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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.