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Finding the Fourth Proportional to 1,164.66, 1,743.72 and 615.60

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Solution

The fourth proportional to 1,164.66, 1,743.72 and 615.60 is: 921.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,164.66 : 1,743.72 = 615.60 : x
  2. Step 2: Convert to fraction form
    1,164.66/1,743.72 = 615.60/x
  3. Step 3: Cross multiply
    1,164.66x = 1,743.72 × 615.60
  4. Step 4: Simplify right side
    1,164.66x = 1,073,434.03
  5. Step 5: Solve for x
    x = 1,073,434.03/1,164.66
  6. Step 6: Final answer
    x = 921.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.