Home / 1,320.43-1,981.32-541.01

Finding the Fourth Proportional to 1,320.43, 1,981.32 and 541.01

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Solution

The fourth proportional to 1,320.43, 1,981.32 and 541.01 is: 811.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.43 : 1,981.32 = 541.01 : x
  2. Step 2: Convert to fraction form
    1,320.43/1,981.32 = 541.01/x
  3. Step 3: Cross multiply
    1,320.43x = 1,981.32 × 541.01
  4. Step 4: Simplify right side
    1,320.43x = 1,071,913.93
  5. Step 5: Solve for x
    x = 1,071,913.93/1,320.43
  6. Step 6: Final answer
    x = 811.79

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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.