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Finding the Fourth Proportional to 1,297.57, 1,945.19 and 475.28

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Solution

The fourth proportional to 1,297.57, 1,945.19 and 475.28 is: 712.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.57 : 1,945.19 = 475.28 : x
  2. Step 2: Convert to fraction form
    1,297.57/1,945.19 = 475.28/x
  3. Step 3: Cross multiply
    1,297.57x = 1,945.19 × 475.28
  4. Step 4: Simplify right side
    1,297.57x = 924,515.95
  5. Step 5: Solve for x
    x = 924,515.95/1,297.57
  6. Step 6: Final answer
    x = 712.50

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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.