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Finding the Fourth Proportional to 1,419.19, 1,956.95 and 887.88

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Solution

The fourth proportional to 1,419.19, 1,956.95 and 887.88 is: 1,224.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,419.19 : 1,956.95 = 887.88 : x
  2. Step 2: Convert to fraction form
    1,419.19/1,956.95 = 887.88/x
  3. Step 3: Cross multiply
    1,419.19x = 1,956.95 × 887.88
  4. Step 4: Simplify right side
    1,419.19x = 1,737,536.77
  5. Step 5: Solve for x
    x = 1,737,536.77/1,419.19
  6. Step 6: Final answer
    x = 1,224.32

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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.