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Finding the Fourth Proportional to 818.83, 1,225.41 and 784.81

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Solution

The fourth proportional to 818.83, 1,225.41 and 784.81 is: 1,174.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.83 : 1,225.41 = 784.81 : x
  2. Step 2: Convert to fraction form
    818.83/1,225.41 = 784.81/x
  3. Step 3: Cross multiply
    818.83x = 1,225.41 × 784.81
  4. Step 4: Simplify right side
    818.83x = 961,714.02
  5. Step 5: Solve for x
    x = 961,714.02/818.83
  6. Step 6: Final answer
    x = 1,174.50

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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.