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Finding the Fourth Proportional to 334.10, 498.70 and 287.94

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Solution

The fourth proportional to 334.10, 498.70 and 287.94 is: 429.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.10 : 498.70 = 287.94 : x
  2. Step 2: Convert to fraction form
    334.10/498.70 = 287.94/x
  3. Step 3: Cross multiply
    334.10x = 498.70 × 287.94
  4. Step 4: Simplify right side
    334.10x = 143,595.68
  5. Step 5: Solve for x
    x = 143,595.68/334.10
  6. Step 6: Final answer
    x = 429.80

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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.