Home / 1,320.51-1,981.10-396.06

Finding the Fourth Proportional to 1,320.51, 1,981.10 and 396.06

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Solution

The fourth proportional to 1,320.51, 1,981.10 and 396.06 is: 594.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.51 : 1,981.10 = 396.06 : x
  2. Step 2: Convert to fraction form
    1,320.51/1,981.10 = 396.06/x
  3. Step 3: Cross multiply
    1,320.51x = 1,981.10 × 396.06
  4. Step 4: Simplify right side
    1,320.51x = 784,634.47
  5. Step 5: Solve for x
    x = 784,634.47/1,320.51
  6. Step 6: Final answer
    x = 594.19

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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.