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Finding the Fourth Proportional to 640.93, 884.72 and 419.93

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Solution

The fourth proportional to 640.93, 884.72 and 419.93 is: 579.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.93 : 884.72 = 419.93 : x
  2. Step 2: Convert to fraction form
    640.93/884.72 = 419.93/x
  3. Step 3: Cross multiply
    640.93x = 884.72 × 419.93
  4. Step 4: Simplify right side
    640.93x = 371,518.37
  5. Step 5: Solve for x
    x = 371,518.37/640.93
  6. Step 6: Final answer
    x = 579.66

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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.