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Finding the Fourth Proportional to 1,297.15, 1,945.51 and 475.45

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Solution

The fourth proportional to 1,297.15, 1,945.51 and 475.45 is: 713.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.15 : 1,945.51 = 475.45 : x
  2. Step 2: Convert to fraction form
    1,297.15/1,945.51 = 475.45/x
  3. Step 3: Cross multiply
    1,297.15x = 1,945.51 × 475.45
  4. Step 4: Simplify right side
    1,297.15x = 924,986.68
  5. Step 5: Solve for x
    x = 924,986.68/1,297.15
  6. Step 6: Final answer
    x = 713.09

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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.