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Finding the Fourth Proportional to 353.63, 528.57 and 318.86

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Solution

The fourth proportional to 353.63, 528.57 and 318.86 is: 476.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.63 : 528.57 = 318.86 : x
  2. Step 2: Convert to fraction form
    353.63/528.57 = 318.86/x
  3. Step 3: Cross multiply
    353.63x = 528.57 × 318.86
  4. Step 4: Simplify right side
    353.63x = 168,537.19
  5. Step 5: Solve for x
    x = 168,537.19/353.63
  6. Step 6: Final answer
    x = 476.60

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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.