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Finding the Fourth Proportional to 1,360.78, 2,040.18 and 435.82

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Solution

The fourth proportional to 1,360.78, 2,040.18 and 435.82 is: 653.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,360.78 : 2,040.18 = 435.82 : x
  2. Step 2: Convert to fraction form
    1,360.78/2,040.18 = 435.82/x
  3. Step 3: Cross multiply
    1,360.78x = 2,040.18 × 435.82
  4. Step 4: Simplify right side
    1,360.78x = 889,151.25
  5. Step 5: Solve for x
    x = 889,151.25/1,360.78
  6. Step 6: Final answer
    x = 653.41

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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.