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Finding the Fourth Proportional to 690.96, 953.42 and 411.09

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Solution

The fourth proportional to 690.96, 953.42 and 411.09 is: 567.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.96 : 953.42 = 411.09 : x
  2. Step 2: Convert to fraction form
    690.96/953.42 = 411.09/x
  3. Step 3: Cross multiply
    690.96x = 953.42 × 411.09
  4. Step 4: Simplify right side
    690.96x = 391,939.37
  5. Step 5: Solve for x
    x = 391,939.37/690.96
  6. Step 6: Final answer
    x = 567.24

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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.