Home / 2,160.45-2,981.70-1,320.99

Finding the Fourth Proportional to 2,160.45, 2,981.70 and 1,320.99

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Solution

The fourth proportional to 2,160.45, 2,981.70 and 1,320.99 is: 1,823.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.45 : 2,981.70 = 1,320.99 : x
  2. Step 2: Convert to fraction form
    2,160.45/2,981.70 = 1,320.99/x
  3. Step 3: Cross multiply
    2,160.45x = 2,981.70 × 1,320.99
  4. Step 4: Simplify right side
    2,160.45x = 3,938,795.88
  5. Step 5: Solve for x
    x = 3,938,795.88/2,160.45
  6. Step 6: Final answer
    x = 1,823.14

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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.