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Finding the Fourth Proportional to 621.13, 856.28 and 444.05

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Solution

The fourth proportional to 621.13, 856.28 and 444.05 is: 612.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.13 : 856.28 = 444.05 : x
  2. Step 2: Convert to fraction form
    621.13/856.28 = 444.05/x
  3. Step 3: Cross multiply
    621.13x = 856.28 × 444.05
  4. Step 4: Simplify right side
    621.13x = 380,224.63
  5. Step 5: Solve for x
    x = 380,224.63/621.13
  6. Step 6: Final answer
    x = 612.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.