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Finding the Fourth Proportional to 846.07, 1,269.31 and 318.98

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Solution

The fourth proportional to 846.07, 1,269.31 and 318.98 is: 478.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.07 : 1,269.31 = 318.98 : x
  2. Step 2: Convert to fraction form
    846.07/1,269.31 = 318.98/x
  3. Step 3: Cross multiply
    846.07x = 1,269.31 × 318.98
  4. Step 4: Simplify right side
    846.07x = 404,890.16
  5. Step 5: Solve for x
    x = 404,890.16/846.07
  6. Step 6: Final answer
    x = 478.55

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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.