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Finding the Fourth Proportional to 1,165.94, 1,609.15 and 668.48

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Solution

The fourth proportional to 1,165.94, 1,609.15 and 668.48 is: 922.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,165.94 : 1,609.15 = 668.48 : x
  2. Step 2: Convert to fraction form
    1,165.94/1,609.15 = 668.48/x
  3. Step 3: Cross multiply
    1,165.94x = 1,609.15 × 668.48
  4. Step 4: Simplify right side
    1,165.94x = 1,075,686.60
  5. Step 5: Solve for x
    x = 1,075,686.60/1,165.94
  6. Step 6: Final answer
    x = 922.59

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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.