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Finding the Fourth Proportional to 952.80, 1,315.08 and 620.65

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Solution

The fourth proportional to 952.80, 1,315.08 and 620.65 is: 856.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.80 : 1,315.08 = 620.65 : x
  2. Step 2: Convert to fraction form
    952.80/1,315.08 = 620.65/x
  3. Step 3: Cross multiply
    952.80x = 1,315.08 × 620.65
  4. Step 4: Simplify right side
    952.80x = 816,197.83
  5. Step 5: Solve for x
    x = 816,197.83/952.80
  6. Step 6: Final answer
    x = 856.63

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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.