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Finding the Fourth Proportional to 1,328.76, 1,833.50 and 739.12

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Solution

The fourth proportional to 1,328.76, 1,833.50 and 739.12 is: 1,019.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.76 : 1,833.50 = 739.12 : x
  2. Step 2: Convert to fraction form
    1,328.76/1,833.50 = 739.12/x
  3. Step 3: Cross multiply
    1,328.76x = 1,833.50 × 739.12
  4. Step 4: Simplify right side
    1,328.76x = 1,355,176.52
  5. Step 5: Solve for x
    x = 1,355,176.52/1,328.76
  6. Step 6: Final answer
    x = 1,019.88

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1.5x scale

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.