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Finding the Fourth Proportional to 640.01, 883.33 and 418.88

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Solution

The fourth proportional to 640.01, 883.33 and 418.88 is: 578.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.01 : 883.33 = 418.88 : x
  2. Step 2: Convert to fraction form
    640.01/883.33 = 418.88/x
  3. Step 3: Cross multiply
    640.01x = 883.33 × 418.88
  4. Step 4: Simplify right side
    640.01x = 370,009.27
  5. Step 5: Solve for x
    x = 370,009.27/640.01
  6. Step 6: Final answer
    x = 578.13

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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.