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Finding the Fourth Proportional to 952.80, 1,314.48 and 690.24

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Solution

The fourth proportional to 952.80, 1,314.48 and 690.24 is: 952.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.80 : 1,314.48 = 690.24 : x
  2. Step 2: Convert to fraction form
    952.80/1,314.48 = 690.24/x
  3. Step 3: Cross multiply
    952.80x = 1,314.48 × 690.24
  4. Step 4: Simplify right side
    952.80x = 907,306.68
  5. Step 5: Solve for x
    x = 907,306.68/952.80
  6. Step 6: Final answer
    x = 952.25

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1.5x scale

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.