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Finding the Fourth Proportional to 640.00, 883.46 and 443.63

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Solution

The fourth proportional to 640.00, 883.46 and 443.63 is: 612.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.00 : 883.46 = 443.63 : x
  2. Step 2: Convert to fraction form
    640.00/883.46 = 443.63/x
  3. Step 3: Cross multiply
    640.00x = 883.46 × 443.63
  4. Step 4: Simplify right side
    640.00x = 391,925.21
  5. Step 5: Solve for x
    x = 391,925.21/640.00
  6. Step 6: Final answer
    x = 612.38

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1.5x scale

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.