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Finding the Fourth Proportional to 469, 649.99 and 461.80

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Solution

The fourth proportional to 469, 649.99 and 461.80 is: 640.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    469 : 649.99 = 461.80 : x
  2. Step 2: Convert to fraction form
    469/649.99 = 461.80/x
  3. Step 3: Cross multiply
    469x = 649.99 × 461.80
  4. Step 4: Simplify right side
    469x = 300,165.38
  5. Step 5: Solve for x
    x = 300,165.38/469
  6. Step 6: Final answer
    x = 640.01

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.