Home / 628.08-943.20-411.72

Finding the Fourth Proportional to 628.08, 943.20 and 411.72

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Solution

The fourth proportional to 628.08, 943.20 and 411.72 is: 618.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.08 : 943.20 = 411.72 : x
  2. Step 2: Convert to fraction form
    628.08/943.20 = 411.72/x
  3. Step 3: Cross multiply
    628.08x = 943.20 × 411.72
  4. Step 4: Simplify right side
    628.08x = 388,334.30
  5. Step 5: Solve for x
    x = 388,334.30/628.08
  6. Step 6: Final answer
    x = 618.29

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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.