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Finding the Fourth Proportional to 1,194.95, 1,649.06 and 663.86

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Solution

The fourth proportional to 1,194.95, 1,649.06 and 663.86 is: 916.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,194.95 : 1,649.06 = 663.86 : x
  2. Step 2: Convert to fraction form
    1,194.95/1,649.06 = 663.86/x
  3. Step 3: Cross multiply
    1,194.95x = 1,649.06 × 663.86
  4. Step 4: Simplify right side
    1,194.95x = 1,094,733.41
  5. Step 5: Solve for x
    x = 1,094,733.41/1,194.95
  6. Step 6: Final answer
    x = 916.14

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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.