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Finding the Fourth Proportional to 894.72, 1,342.56 and 318

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Solution

The fourth proportional to 894.72, 1,342.56 and 318 is: 477.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.72 : 1,342.56 = 318 : x
  2. Step 2: Convert to fraction form
    894.72/1,342.56 = 318/x
  3. Step 3: Cross multiply
    894.72x = 1,342.56 × 318
  4. Step 4: Simplify right side
    894.72x = 426,934.08
  5. Step 5: Solve for x
    x = 426,934.08/894.72
  6. Step 6: Final answer
    x = 477.17

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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.