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Finding the Fourth Proportional to 3,420.99, 5,131.62 and 956.16

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Solution

The fourth proportional to 3,420.99, 5,131.62 and 956.16 is: 1,434.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.99 : 5,131.62 = 956.16 : x
  2. Step 2: Convert to fraction form
    3,420.99/5,131.62 = 956.16/x
  3. Step 3: Cross multiply
    3,420.99x = 5,131.62 × 956.16
  4. Step 4: Simplify right side
    3,420.99x = 4,906,649.78
  5. Step 5: Solve for x
    x = 4,906,649.78/3,420.99
  6. Step 6: Final answer
    x = 1,434.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.