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Finding the Fourth Proportional to 552.94, 828.46 and 390.28

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Solution

The fourth proportional to 552.94, 828.46 and 390.28 is: 584.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.94 : 828.46 = 390.28 : x
  2. Step 2: Convert to fraction form
    552.94/828.46 = 390.28/x
  3. Step 3: Cross multiply
    552.94x = 828.46 × 390.28
  4. Step 4: Simplify right side
    552.94x = 323,331.37
  5. Step 5: Solve for x
    x = 323,331.37/552.94
  6. Step 6: Final answer
    x = 584.75

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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.