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Finding the Fourth Proportional to 631.01, 947.46 and 388.55

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Solution

The fourth proportional to 631.01, 947.46 and 388.55 is: 583.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.01 : 947.46 = 388.55 : x
  2. Step 2: Convert to fraction form
    631.01/947.46 = 388.55/x
  3. Step 3: Cross multiply
    631.01x = 947.46 × 388.55
  4. Step 4: Simplify right side
    631.01x = 368,135.58
  5. Step 5: Solve for x
    x = 368,135.58/631.01
  6. Step 6: Final answer
    x = 583.41

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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.