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Finding the Fourth Proportional to 640.06, 883.34 and 360.30

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Solution

The fourth proportional to 640.06, 883.34 and 360.30 is: 497.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.06 : 883.34 = 360.30 : x
  2. Step 2: Convert to fraction form
    640.06/883.34 = 360.30/x
  3. Step 3: Cross multiply
    640.06x = 883.34 × 360.30
  4. Step 4: Simplify right side
    640.06x = 318,267.40
  5. Step 5: Solve for x
    x = 318,267.40/640.06
  6. Step 6: Final answer
    x = 497.25

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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.