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Finding the Fourth Proportional to 1,603.95, 2,212.74 and 1,132.53

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Solution

The fourth proportional to 1,603.95, 2,212.74 and 1,132.53 is: 1,562.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,603.95 : 2,212.74 = 1,132.53 : x
  2. Step 2: Convert to fraction form
    1,603.95/2,212.74 = 1,132.53/x
  3. Step 3: Cross multiply
    1,603.95x = 2,212.74 × 1,132.53
  4. Step 4: Simplify right side
    1,603.95x = 2,505,994.43
  5. Step 5: Solve for x
    x = 2,505,994.43/1,603.95
  6. Step 6: Final answer
    x = 1,562.39

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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.