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Finding the Fourth Proportional to 1,106.38, 1,526.97 and 664.48

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Solution

The fourth proportional to 1,106.38, 1,526.97 and 664.48 is: 917.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,106.38 : 1,526.97 = 664.48 : x
  2. Step 2: Convert to fraction form
    1,106.38/1,526.97 = 664.48/x
  3. Step 3: Cross multiply
    1,106.38x = 1,526.97 × 664.48
  4. Step 4: Simplify right side
    1,106.38x = 1,014,641.03
  5. Step 5: Solve for x
    x = 1,014,641.03/1,106.38
  6. Step 6: Final answer
    x = 917.08

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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.