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Finding the Fourth Proportional to 1,886.78, 2,603.46 and 1,356.68

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Solution

The fourth proportional to 1,886.78, 2,603.46 and 1,356.68 is: 1,872.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886.78 : 2,603.46 = 1,356.68 : x
  2. Step 2: Convert to fraction form
    1,886.78/2,603.46 = 1,356.68/x
  3. Step 3: Cross multiply
    1,886.78x = 2,603.46 × 1,356.68
  4. Step 4: Simplify right side
    1,886.78x = 3,532,062.11
  5. Step 5: Solve for x
    x = 3,532,062.11/1,886.78
  6. Step 6: Final answer
    x = 1,872.01

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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.