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Finding the Fourth Proportional to 940.74, 1,298.30 and 547.79

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Solution

The fourth proportional to 940.74, 1,298.30 and 547.79 is: 756.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.74 : 1,298.30 = 547.79 : x
  2. Step 2: Convert to fraction form
    940.74/1,298.30 = 547.79/x
  3. Step 3: Cross multiply
    940.74x = 1,298.30 × 547.79
  4. Step 4: Simplify right side
    940.74x = 711,195.76
  5. Step 5: Solve for x
    x = 711,195.76/940.74
  6. Step 6: Final answer
    x = 756.00

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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.