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Finding the Fourth Proportional to 1,253.42, 1,729.95 and 945.26

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Solution

The fourth proportional to 1,253.42, 1,729.95 and 945.26 is: 1,304.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.42 : 1,729.95 = 945.26 : x
  2. Step 2: Convert to fraction form
    1,253.42/1,729.95 = 945.26/x
  3. Step 3: Cross multiply
    1,253.42x = 1,729.95 × 945.26
  4. Step 4: Simplify right side
    1,253.42x = 1,635,252.54
  5. Step 5: Solve for x
    x = 1,635,252.54/1,253.42
  6. Step 6: Final answer
    x = 1,304.63

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1.5x scale

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.