Home / 1,328.72-1,833.60-739.28

Finding the Fourth Proportional to 1,328.72, 1,833.60 and 739.28

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Solution

The fourth proportional to 1,328.72, 1,833.60 and 739.28 is: 1,020.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.72 : 1,833.60 = 739.28 : x
  2. Step 2: Convert to fraction form
    1,328.72/1,833.60 = 739.28/x
  3. Step 3: Cross multiply
    1,328.72x = 1,833.60 × 739.28
  4. Step 4: Simplify right side
    1,328.72x = 1,355,543.81
  5. Step 5: Solve for x
    x = 1,355,543.81/1,328.72
  6. Step 6: Final answer
    x = 1,020.19

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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.