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Finding the Fourth Proportional to 1,274.64, 1,760.05 and 1,038.63

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Solution

The fourth proportional to 1,274.64, 1,760.05 and 1,038.63 is: 1,434.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.64 : 1,760.05 = 1,038.63 : x
  2. Step 2: Convert to fraction form
    1,274.64/1,760.05 = 1,038.63/x
  3. Step 3: Cross multiply
    1,274.64x = 1,760.05 × 1,038.63
  4. Step 4: Simplify right side
    1,274.64x = 1,828,035.54
  5. Step 5: Solve for x
    x = 1,828,035.54/1,274.64
  6. Step 6: Final answer
    x = 1,434.16

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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.