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Finding the Fourth Proportional to 1,195.16, 1,649.15 and 664.01

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Solution

The fourth proportional to 1,195.16, 1,649.15 and 664.01 is: 916.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.16 : 1,649.15 = 664.01 : x
  2. Step 2: Convert to fraction form
    1,195.16/1,649.15 = 664.01/x
  3. Step 3: Cross multiply
    1,195.16x = 1,649.15 × 664.01
  4. Step 4: Simplify right side
    1,195.16x = 1,095,043.85
  5. Step 5: Solve for x
    x = 1,095,043.85/1,195.16
  6. Step 6: Final answer
    x = 916.23

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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.