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Finding the Fourth Proportional to 1,905.70, 2,630.02 and 1,119.86

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Solution

The fourth proportional to 1,905.70, 2,630.02 and 1,119.86 is: 1,545.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.70 : 2,630.02 = 1,119.86 : x
  2. Step 2: Convert to fraction form
    1,905.70/2,630.02 = 1,119.86/x
  3. Step 3: Cross multiply
    1,905.70x = 2,630.02 × 1,119.86
  4. Step 4: Simplify right side
    1,905.70x = 2,945,254.20
  5. Step 5: Solve for x
    x = 2,945,254.20/1,905.70
  6. Step 6: Final answer
    x = 1,545.50

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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.