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Finding the Fourth Proportional to 1,164.62, 1,607.10 and 640.65

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Solution

The fourth proportional to 1,164.62, 1,607.10 and 640.65 is: 884.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,164.62 : 1,607.10 = 640.65 : x
  2. Step 2: Convert to fraction form
    1,164.62/1,607.10 = 640.65/x
  3. Step 3: Cross multiply
    1,164.62x = 1,607.10 × 640.65
  4. Step 4: Simplify right side
    1,164.62x = 1,029,588.62
  5. Step 5: Solve for x
    x = 1,029,588.62/1,164.62
  6. Step 6: Final answer
    x = 884.06

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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.