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Finding the Fourth Proportional to 320.77, 478.64 and 301.18

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Solution

The fourth proportional to 320.77, 478.64 and 301.18 is: 449.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    320.77 : 478.64 = 301.18 : x
  2. Step 2: Convert to fraction form
    320.77/478.64 = 301.18/x
  3. Step 3: Cross multiply
    320.77x = 478.64 × 301.18
  4. Step 4: Simplify right side
    320.77x = 144,158.74
  5. Step 5: Solve for x
    x = 144,158.74/320.77
  6. Step 6: Final answer
    x = 449.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.