Home / 1,388.32-2,082.12-414.16

Finding the Fourth Proportional to 1,388.32, 2,082.12 and 414.16

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Solution

The fourth proportional to 1,388.32, 2,082.12 and 414.16 is: 621.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.32 : 2,082.12 = 414.16 : x
  2. Step 2: Convert to fraction form
    1,388.32/2,082.12 = 414.16/x
  3. Step 3: Cross multiply
    1,388.32x = 2,082.12 × 414.16
  4. Step 4: Simplify right side
    1,388.32x = 862,330.82
  5. Step 5: Solve for x
    x = 862,330.82/1,388.32
  6. Step 6: Final answer
    x = 621.13

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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.