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Finding the Fourth Proportional to 2,280.48, 3,420.67 and 636.99

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Solution

The fourth proportional to 2,280.48, 3,420.67 and 636.99 is: 955.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.48 : 3,420.67 = 636.99 : x
  2. Step 2: Convert to fraction form
    2,280.48/3,420.67 = 636.99/x
  3. Step 3: Cross multiply
    2,280.48x = 3,420.67 × 636.99
  4. Step 4: Simplify right side
    2,280.48x = 2,178,932.58
  5. Step 5: Solve for x
    x = 2,178,932.58/2,280.48
  6. Step 6: Final answer
    x = 955.47

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1.5x scale

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.