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Finding the Fourth Proportional to 322.09, 482.55 and 287.50

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Solution

The fourth proportional to 322.09, 482.55 and 287.50 is: 430.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.09 : 482.55 = 287.50 : x
  2. Step 2: Convert to fraction form
    322.09/482.55 = 287.50/x
  3. Step 3: Cross multiply
    322.09x = 482.55 × 287.50
  4. Step 4: Simplify right side
    322.09x = 138,733.13
  5. Step 5: Solve for x
    x = 138,733.13/322.09
  6. Step 6: Final answer
    x = 430.73

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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.