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Finding the Fourth Proportional to 621.32, 856.71 and 583.65

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Solution

The fourth proportional to 621.32, 856.71 and 583.65 is: 804.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.32 : 856.71 = 583.65 : x
  2. Step 2: Convert to fraction form
    621.32/856.71 = 583.65/x
  3. Step 3: Cross multiply
    621.32x = 856.71 × 583.65
  4. Step 4: Simplify right side
    621.32x = 500,018.79
  5. Step 5: Solve for x
    x = 500,018.79/621.32
  6. Step 6: Final answer
    x = 804.78

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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.