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Finding the Fourth Proportional to 1,372.45, 2,056.65 and 630.23

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Solution

The fourth proportional to 1,372.45, 2,056.65 and 630.23 is: 944.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.45 : 2,056.65 = 630.23 : x
  2. Step 2: Convert to fraction form
    1,372.45/2,056.65 = 630.23/x
  3. Step 3: Cross multiply
    1,372.45x = 2,056.65 × 630.23
  4. Step 4: Simplify right side
    1,372.45x = 1,296,160.95
  5. Step 5: Solve for x
    x = 1,296,160.95/1,372.45
  6. Step 6: Final answer
    x = 944.41

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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.