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Finding the Fourth Proportional to 1,032.30, 1,539.50 and 879.21

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Solution

The fourth proportional to 1,032.30, 1,539.50 and 879.21 is: 1,311.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,032.30 : 1,539.50 = 879.21 : x
  2. Step 2: Convert to fraction form
    1,032.30/1,539.50 = 879.21/x
  3. Step 3: Cross multiply
    1,032.30x = 1,539.50 × 879.21
  4. Step 4: Simplify right side
    1,032.30x = 1,353,539.40
  5. Step 5: Solve for x
    x = 1,353,539.40/1,032.30
  6. Step 6: Final answer
    x = 1,311.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.