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Finding the Fourth Proportional to 873.23, 1,309.70 and 325.37

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Solution

The fourth proportional to 873.23, 1,309.70 and 325.37 is: 487.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.23 : 1,309.70 = 325.37 : x
  2. Step 2: Convert to fraction form
    873.23/1,309.70 = 325.37/x
  3. Step 3: Cross multiply
    873.23x = 1,309.70 × 325.37
  4. Step 4: Simplify right side
    873.23x = 426,128.91
  5. Step 5: Solve for x
    x = 426,128.91/873.23
  6. Step 6: Final answer
    x = 487.99

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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.