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Finding the Fourth Proportional to 1,026.70, 1,540.70 and 368.56

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Solution

The fourth proportional to 1,026.70, 1,540.70 and 368.56 is: 553.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026.70 : 1,540.70 = 368.56 : x
  2. Step 2: Convert to fraction form
    1,026.70/1,540.70 = 368.56/x
  3. Step 3: Cross multiply
    1,026.70x = 1,540.70 × 368.56
  4. Step 4: Simplify right side
    1,026.70x = 567,840.44
  5. Step 5: Solve for x
    x = 567,840.44/1,026.70
  6. Step 6: Final answer
    x = 553.07

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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.