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Finding the Fourth Proportional to 3,512.64, 5,268.54 and 915.51

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Solution

The fourth proportional to 3,512.64, 5,268.54 and 915.51 is: 1,373.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,512.64 : 5,268.54 = 915.51 : x
  2. Step 2: Convert to fraction form
    3,512.64/5,268.54 = 915.51/x
  3. Step 3: Cross multiply
    3,512.64x = 5,268.54 × 915.51
  4. Step 4: Simplify right side
    3,512.64x = 4,823,401.06
  5. Step 5: Solve for x
    x = 4,823,401.06/3,512.64
  6. Step 6: Final answer
    x = 1,373.16

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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.