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Finding the Fourth Proportional to 1,106.41, 1,526.91 and 664.57

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Solution

The fourth proportional to 1,106.41, 1,526.91 and 664.57 is: 917.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,106.41 : 1,526.91 = 664.57 : x
  2. Step 2: Convert to fraction form
    1,106.41/1,526.91 = 664.57/x
  3. Step 3: Cross multiply
    1,106.41x = 1,526.91 × 664.57
  4. Step 4: Simplify right side
    1,106.41x = 1,014,738.58
  5. Step 5: Solve for x
    x = 1,014,738.58/1,106.41
  6. Step 6: Final answer
    x = 917.15

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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.