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Finding the Fourth Proportional to 1,731.36, 2,389.30 and 945.40

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Solution

The fourth proportional to 1,731.36, 2,389.30 and 945.40 is: 1,304.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,731.36 : 2,389.30 = 945.40 : x
  2. Step 2: Convert to fraction form
    1,731.36/2,389.30 = 945.40/x
  3. Step 3: Cross multiply
    1,731.36x = 2,389.30 × 945.40
  4. Step 4: Simplify right side
    1,731.36x = 2,258,844.22
  5. Step 5: Solve for x
    x = 2,258,844.22/1,731.36
  6. Step 6: Final answer
    x = 1,304.66

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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.