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Finding the Fourth Proportional to 631.10, 870.80 and 382.44

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Solution

The fourth proportional to 631.10, 870.80 and 382.44 is: 527.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.10 : 870.80 = 382.44 : x
  2. Step 2: Convert to fraction form
    631.10/870.80 = 382.44/x
  3. Step 3: Cross multiply
    631.10x = 870.80 × 382.44
  4. Step 4: Simplify right side
    631.10x = 333,026.84
  5. Step 5: Solve for x
    x = 333,026.84/631.10
  6. Step 6: Final answer
    x = 527.70

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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.