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Finding the Fourth Proportional to 478.42, 718.02 and 304.54

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Solution

The fourth proportional to 478.42, 718.02 and 304.54 is: 457.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.42 : 718.02 = 304.54 : x
  2. Step 2: Convert to fraction form
    478.42/718.02 = 304.54/x
  3. Step 3: Cross multiply
    478.42x = 718.02 × 304.54
  4. Step 4: Simplify right side
    478.42x = 218,665.81
  5. Step 5: Solve for x
    x = 218,665.81/478.42
  6. Step 6: Final answer
    x = 457.06

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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.