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Finding the Fourth Proportional to 940.73, 1,298.53 and 548.08

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Solution

The fourth proportional to 940.73, 1,298.53 and 548.08 is: 756.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.73 : 1,298.53 = 548.08 : x
  2. Step 2: Convert to fraction form
    940.73/1,298.53 = 548.08/x
  3. Step 3: Cross multiply
    940.73x = 1,298.53 × 548.08
  4. Step 4: Simplify right side
    940.73x = 711,698.32
  5. Step 5: Solve for x
    x = 711,698.32/940.73
  6. Step 6: Final answer
    x = 756.54

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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.