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Finding the Fourth Proportional to 478.89, 660.69 and 303.93

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Solution

The fourth proportional to 478.89, 660.69 and 303.93 is: 419.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.89 : 660.69 = 303.93 : x
  2. Step 2: Convert to fraction form
    478.89/660.69 = 303.93/x
  3. Step 3: Cross multiply
    478.89x = 660.69 × 303.93
  4. Step 4: Simplify right side
    478.89x = 200,803.51
  5. Step 5: Solve for x
    x = 200,803.51/478.89
  6. Step 6: Final answer
    x = 419.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.