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Finding the Fourth Proportional to 1,328.15, 1,833.06 and 956.36

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Solution

The fourth proportional to 1,328.15, 1,833.06 and 956.36 is: 1,319.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.15 : 1,833.06 = 956.36 : x
  2. Step 2: Convert to fraction form
    1,328.15/1,833.06 = 956.36/x
  3. Step 3: Cross multiply
    1,328.15x = 1,833.06 × 956.36
  4. Step 4: Simplify right side
    1,328.15x = 1,753,056.10
  5. Step 5: Solve for x
    x = 1,753,056.10/1,328.15
  6. Step 6: Final answer
    x = 1,319.93

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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.