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Finding the Fourth Proportional to 1,268.76, 1,903.14 and 435.81

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Solution

The fourth proportional to 1,268.76, 1,903.14 and 435.81 is: 653.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.76 : 1,903.14 = 435.81 : x
  2. Step 2: Convert to fraction form
    1,268.76/1,903.14 = 435.81/x
  3. Step 3: Cross multiply
    1,268.76x = 1,903.14 × 435.81
  4. Step 4: Simplify right side
    1,268.76x = 829,407.44
  5. Step 5: Solve for x
    x = 829,407.44/1,268.76
  6. Step 6: Final answer
    x = 653.72

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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.