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Finding the Fourth Proportional to 2,646.78, 3,970.17 and 1,004.72

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Solution

The fourth proportional to 2,646.78, 3,970.17 and 1,004.72 is: 1,507.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,646.78 : 3,970.17 = 1,004.72 : x
  2. Step 2: Convert to fraction form
    2,646.78/3,970.17 = 1,004.72/x
  3. Step 3: Cross multiply
    2,646.78x = 3,970.17 × 1,004.72
  4. Step 4: Simplify right side
    2,646.78x = 3,988,889.35
  5. Step 5: Solve for x
    x = 3,988,889.35/2,646.78
  6. Step 6: Final answer
    x = 1,507.07

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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.