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Finding the Fourth Proportional to 1,281.74, 1,923.30 and 632.48

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Solution

The fourth proportional to 1,281.74, 1,923.30 and 632.48 is: 949.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281.74 : 1,923.30 = 632.48 : x
  2. Step 2: Convert to fraction form
    1,281.74/1,923.30 = 632.48/x
  3. Step 3: Cross multiply
    1,281.74x = 1,923.30 × 632.48
  4. Step 4: Simplify right side
    1,281.74x = 1,216,448.78
  5. Step 5: Solve for x
    x = 1,216,448.78/1,281.74
  6. Step 6: Final answer
    x = 949.06

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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.