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Finding the Fourth Proportional to 3,518.94, 5,278.47 and 921.94

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Solution

The fourth proportional to 3,518.94, 5,278.47 and 921.94 is: 1,382.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,518.94 : 5,278.47 = 921.94 : x
  2. Step 2: Convert to fraction form
    3,518.94/5,278.47 = 921.94/x
  3. Step 3: Cross multiply
    3,518.94x = 5,278.47 × 921.94
  4. Step 4: Simplify right side
    3,518.94x = 4,866,432.63
  5. Step 5: Solve for x
    x = 4,866,432.63/3,518.94
  6. Step 6: Final answer
    x = 1,382.93

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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.