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Finding the Fourth Proportional to 804.91, 1,110.98 and 455.80

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Solution

The fourth proportional to 804.91, 1,110.98 and 455.80 is: 629.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.91 : 1,110.98 = 455.80 : x
  2. Step 2: Convert to fraction form
    804.91/1,110.98 = 455.80/x
  3. Step 3: Cross multiply
    804.91x = 1,110.98 × 455.80
  4. Step 4: Simplify right side
    804.91x = 506,384.68
  5. Step 5: Solve for x
    x = 506,384.68/804.91
  6. Step 6: Final answer
    x = 629.12

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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.