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Finding the Fourth Proportional to 1,665.64, 2,498.57 and 433.09

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Solution

The fourth proportional to 1,665.64, 2,498.57 and 433.09 is: 649.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,665.64 : 2,498.57 = 433.09 : x
  2. Step 2: Convert to fraction form
    1,665.64/2,498.57 = 433.09/x
  3. Step 3: Cross multiply
    1,665.64x = 2,498.57 × 433.09
  4. Step 4: Simplify right side
    1,665.64x = 1,082,105.68
  5. Step 5: Solve for x
    x = 1,082,105.68/1,665.64
  6. Step 6: Final answer
    x = 649.66

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1.5x scale

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.