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Finding the Fourth Proportional to 1,295.55, 1,943.29 and 321.64

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Solution

The fourth proportional to 1,295.55, 1,943.29 and 321.64 is: 482.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.55 : 1,943.29 = 321.64 : x
  2. Step 2: Convert to fraction form
    1,295.55/1,943.29 = 321.64/x
  3. Step 3: Cross multiply
    1,295.55x = 1,943.29 × 321.64
  4. Step 4: Simplify right side
    1,295.55x = 625,039.80
  5. Step 5: Solve for x
    x = 625,039.80/1,295.55
  6. Step 6: Final answer
    x = 482.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.