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Finding the Fourth Proportional to 690.92, 953.37 and 380.42

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Solution

The fourth proportional to 690.92, 953.37 and 380.42 is: 524.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.92 : 953.37 = 380.42 : x
  2. Step 2: Convert to fraction form
    690.92/953.37 = 380.42/x
  3. Step 3: Cross multiply
    690.92x = 953.37 × 380.42
  4. Step 4: Simplify right side
    690.92x = 362,681.02
  5. Step 5: Solve for x
    x = 362,681.02/690.92
  6. Step 6: Final answer
    x = 524.92

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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.