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Finding the Fourth Proportional to 690.98, 953.53 and 376.25

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Solution

The fourth proportional to 690.98, 953.53 and 376.25 is: 519.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.98 : 953.53 = 376.25 : x
  2. Step 2: Convert to fraction form
    690.98/953.53 = 376.25/x
  3. Step 3: Cross multiply
    690.98x = 953.53 × 376.25
  4. Step 4: Simplify right side
    690.98x = 358,759.95
  5. Step 5: Solve for x
    x = 358,759.95/690.98
  6. Step 6: Final answer
    x = 519.21

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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.