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Finding the Fourth Proportional to 1,190.60, 1,642.25 and 910.88

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Solution

The fourth proportional to 1,190.60, 1,642.25 and 910.88 is: 1,256.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.60 : 1,642.25 = 910.88 : x
  2. Step 2: Convert to fraction form
    1,190.60/1,642.25 = 910.88/x
  3. Step 3: Cross multiply
    1,190.60x = 1,642.25 × 910.88
  4. Step 4: Simplify right side
    1,190.60x = 1,495,888.13
  5. Step 5: Solve for x
    x = 1,495,888.13/1,190.60
  6. Step 6: Final answer
    x = 1,256.42

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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.