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Finding the Fourth Proportional to 1,101.79, 1,520.64 and 682.36

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Solution

The fourth proportional to 1,101.79, 1,520.64 and 682.36 is: 941.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.79 : 1,520.64 = 682.36 : x
  2. Step 2: Convert to fraction form
    1,101.79/1,520.64 = 682.36/x
  3. Step 3: Cross multiply
    1,101.79x = 1,520.64 × 682.36
  4. Step 4: Simplify right side
    1,101.79x = 1,037,623.91
  5. Step 5: Solve for x
    x = 1,037,623.91/1,101.79
  6. Step 6: Final answer
    x = 941.76

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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.