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Finding the Fourth Proportional to 804.94, 1,206.94 and 317.72

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Solution

The fourth proportional to 804.94, 1,206.94 and 317.72 is: 476.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.94 : 1,206.94 = 317.72 : x
  2. Step 2: Convert to fraction form
    804.94/1,206.94 = 317.72/x
  3. Step 3: Cross multiply
    804.94x = 1,206.94 × 317.72
  4. Step 4: Simplify right side
    804.94x = 383,468.98
  5. Step 5: Solve for x
    x = 383,468.98/804.94
  6. Step 6: Final answer
    x = 476.39

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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.