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Finding the Fourth Proportional to 314.85, 471.36 and 284.48

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Solution

The fourth proportional to 314.85, 471.36 and 284.48 is: 425.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.85 : 471.36 = 284.48 : x
  2. Step 2: Convert to fraction form
    314.85/471.36 = 284.48/x
  3. Step 3: Cross multiply
    314.85x = 471.36 × 284.48
  4. Step 4: Simplify right side
    314.85x = 134,090.14
  5. Step 5: Solve for x
    x = 134,090.14/314.85
  6. Step 6: Final answer
    x = 425.89

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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.