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Finding the Fourth Proportional to 498.70, 687.81 and 433.09

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Solution

The fourth proportional to 498.70, 687.81 and 433.09 is: 597.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.70 : 687.81 = 433.09 : x
  2. Step 2: Convert to fraction form
    498.70/687.81 = 433.09/x
  3. Step 3: Cross multiply
    498.70x = 687.81 × 433.09
  4. Step 4: Simplify right side
    498.70x = 297,882.96
  5. Step 5: Solve for x
    x = 297,882.96/498.70
  6. Step 6: Final answer
    x = 597.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.