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Finding the Fourth Proportional to 320.56, 482.56 and 275.91

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Solution

The fourth proportional to 320.56, 482.56 and 275.91 is: 415.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.56 : 482.56 = 275.91 : x
  2. Step 2: Convert to fraction form
    320.56/482.56 = 275.91/x
  3. Step 3: Cross multiply
    320.56x = 482.56 × 275.91
  4. Step 4: Simplify right side
    320.56x = 133,140.63
  5. Step 5: Solve for x
    x = 133,140.63/320.56
  6. Step 6: Final answer
    x = 415.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.