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Finding the Fourth Proportional to 1,631.38, 2,446.08 and 643.02

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Solution

The fourth proportional to 1,631.38, 2,446.08 and 643.02 is: 964.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.38 : 2,446.08 = 643.02 : x
  2. Step 2: Convert to fraction form
    1,631.38/2,446.08 = 643.02/x
  3. Step 3: Cross multiply
    1,631.38x = 2,446.08 × 643.02
  4. Step 4: Simplify right side
    1,631.38x = 1,572,878.36
  5. Step 5: Solve for x
    x = 1,572,878.36/1,631.38
  6. Step 6: Final answer
    x = 964.14

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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.