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Finding the Fourth Proportional to 1,322.90, 1,826.35 and 903.86

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Solution

The fourth proportional to 1,322.90, 1,826.35 and 903.86 is: 1,247.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.90 : 1,826.35 = 903.86 : x
  2. Step 2: Convert to fraction form
    1,322.90/1,826.35 = 903.86/x
  3. Step 3: Cross multiply
    1,322.90x = 1,826.35 × 903.86
  4. Step 4: Simplify right side
    1,322.90x = 1,650,760.17
  5. Step 5: Solve for x
    x = 1,650,760.17/1,322.90
  6. Step 6: Final answer
    x = 1,247.84

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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.