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Finding the Fourth Proportional to 846.86, 1,270.40 and 359.78

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Solution

The fourth proportional to 846.86, 1,270.40 and 359.78 is: 539.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.86 : 1,270.40 = 359.78 : x
  2. Step 2: Convert to fraction form
    846.86/1,270.40 = 359.78/x
  3. Step 3: Cross multiply
    846.86x = 1,270.40 × 359.78
  4. Step 4: Simplify right side
    846.86x = 457,056.36
  5. Step 5: Solve for x
    x = 457,056.36/846.86
  6. Step 6: Final answer
    x = 539.71

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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.