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Finding the Fourth Proportional to 924.81, 1,276.44 and 629.87

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Solution

The fourth proportional to 924.81, 1,276.44 and 629.87 is: 869.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.81 : 1,276.44 = 629.87 : x
  2. Step 2: Convert to fraction form
    924.81/1,276.44 = 629.87/x
  3. Step 3: Cross multiply
    924.81x = 1,276.44 × 629.87
  4. Step 4: Simplify right side
    924.81x = 803,991.26
  5. Step 5: Solve for x
    x = 803,991.26/924.81
  6. Step 6: Final answer
    x = 869.36

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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.