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Finding the Fourth Proportional to 631.61, 945.81 and 528.63

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Solution

The fourth proportional to 631.61, 945.81 and 528.63 is: 791.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.61 : 945.81 = 528.63 : x
  2. Step 2: Convert to fraction form
    631.61/945.81 = 528.63/x
  3. Step 3: Cross multiply
    631.61x = 945.81 × 528.63
  4. Step 4: Simplify right side
    631.61x = 499,980.90
  5. Step 5: Solve for x
    x = 499,980.90/631.61
  6. Step 6: Final answer
    x = 791.60

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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.