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Finding the Fourth Proportional to 1,165.38, 1,608.47 and 668.36

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Solution

The fourth proportional to 1,165.38, 1,608.47 and 668.36 is: 922.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.38 : 1,608.47 = 668.36 : x
  2. Step 2: Convert to fraction form
    1,165.38/1,608.47 = 668.36/x
  3. Step 3: Cross multiply
    1,165.38x = 1,608.47 × 668.36
  4. Step 4: Simplify right side
    1,165.38x = 1,075,025.63
  5. Step 5: Solve for x
    x = 1,075,025.63/1,165.38
  6. Step 6: Final answer
    x = 922.47

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.