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Finding the Fourth Proportional to 1,328.15, 1,832.88 and 730.66

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Solution

The fourth proportional to 1,328.15, 1,832.88 and 730.66 is: 1,008.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.15 : 1,832.88 = 730.66 : x
  2. Step 2: Convert to fraction form
    1,328.15/1,832.88 = 730.66/x
  3. Step 3: Cross multiply
    1,328.15x = 1,832.88 × 730.66
  4. Step 4: Simplify right side
    1,328.15x = 1,339,217.13
  5. Step 5: Solve for x
    x = 1,339,217.13/1,328.15
  6. Step 6: Final answer
    x = 1,008.34

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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.