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Finding the Fourth Proportional to 628.24, 943.52 and 385.20

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Solution

The fourth proportional to 628.24, 943.52 and 385.20 is: 578.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.24 : 943.52 = 385.20 : x
  2. Step 2: Convert to fraction form
    628.24/943.52 = 385.20/x
  3. Step 3: Cross multiply
    628.24x = 943.52 × 385.20
  4. Step 4: Simplify right side
    628.24x = 363,443.90
  5. Step 5: Solve for x
    x = 363,443.90/628.24
  6. Step 6: Final answer
    x = 578.51

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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.