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Finding the Fourth Proportional to 690.30, 952.19 and 454.26

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Solution

The fourth proportional to 690.30, 952.19 and 454.26 is: 626.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.30 : 952.19 = 454.26 : x
  2. Step 2: Convert to fraction form
    690.30/952.19 = 454.26/x
  3. Step 3: Cross multiply
    690.30x = 952.19 × 454.26
  4. Step 4: Simplify right side
    690.30x = 432,539.56
  5. Step 5: Solve for x
    x = 432,539.56/690.30
  6. Step 6: Final answer
    x = 626.60

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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.