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Finding the Fourth Proportional to 1,082.99, 1,621.76 and 718.20

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Solution

The fourth proportional to 1,082.99, 1,621.76 and 718.20 is: 1,075.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.99 : 1,621.76 = 718.20 : x
  2. Step 2: Convert to fraction form
    1,082.99/1,621.76 = 718.20/x
  3. Step 3: Cross multiply
    1,082.99x = 1,621.76 × 718.20
  4. Step 4: Simplify right side
    1,082.99x = 1,164,744.44
  5. Step 5: Solve for x
    x = 1,164,744.44/1,082.99
  6. Step 6: Final answer
    x = 1,075.49

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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.