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Finding the Fourth Proportional to 1,164.85, 1,607.39 and 640.88

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Solution

The fourth proportional to 1,164.85, 1,607.39 and 640.88 is: 884.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,164.85 : 1,607.39 = 640.88 : x
  2. Step 2: Convert to fraction form
    1,164.85/1,607.39 = 640.88/x
  3. Step 3: Cross multiply
    1,164.85x = 1,607.39 × 640.88
  4. Step 4: Simplify right side
    1,164.85x = 1,030,144.90
  5. Step 5: Solve for x
    x = 1,030,144.90/1,164.85
  6. Step 6: Final answer
    x = 884.36

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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.