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Finding the Fourth Proportional to 784.58, 1,176.97 and 264.36

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Solution

The fourth proportional to 784.58, 1,176.97 and 264.36 is: 396.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.58 : 1,176.97 = 264.36 : x
  2. Step 2: Convert to fraction form
    784.58/1,176.97 = 264.36/x
  3. Step 3: Cross multiply
    784.58x = 1,176.97 × 264.36
  4. Step 4: Simplify right side
    784.58x = 311,143.79
  5. Step 5: Solve for x
    x = 311,143.79/784.58
  6. Step 6: Final answer
    x = 396.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.