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Finding the Fourth Proportional to 1,361.90, 2,043.14 and 437.51

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Solution

The fourth proportional to 1,361.90, 2,043.14 and 437.51 is: 656.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.90 : 2,043.14 = 437.51 : x
  2. Step 2: Convert to fraction form
    1,361.90/2,043.14 = 437.51/x
  3. Step 3: Cross multiply
    1,361.90x = 2,043.14 × 437.51
  4. Step 4: Simplify right side
    1,361.90x = 893,881.78
  5. Step 5: Solve for x
    x = 893,881.78/1,361.90
  6. Step 6: Final answer
    x = 656.35

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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.