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Finding the Fourth Proportional to 784.83, 1,177.26 and 264.81

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Solution

The fourth proportional to 784.83, 1,177.26 and 264.81 is: 397.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.83 : 1,177.26 = 264.81 : x
  2. Step 2: Convert to fraction form
    784.83/1,177.26 = 264.81/x
  3. Step 3: Cross multiply
    784.83x = 1,177.26 × 264.81
  4. Step 4: Simplify right side
    784.83x = 311,750.22
  5. Step 5: Solve for x
    x = 311,750.22/784.83
  6. Step 6: Final answer
    x = 397.22

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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.