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Finding the Fourth Proportional to 640.56, 957.50 and 554.88

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Solution

The fourth proportional to 640.56, 957.50 and 554.88 is: 829.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.56 : 957.50 = 554.88 : x
  2. Step 2: Convert to fraction form
    640.56/957.50 = 554.88/x
  3. Step 3: Cross multiply
    640.56x = 957.50 × 554.88
  4. Step 4: Simplify right side
    640.56x = 531,297.60
  5. Step 5: Solve for x
    x = 531,297.60/640.56
  6. Step 6: Final answer
    x = 829.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.