Home / 1,921.34-2,880.07-750.62

Finding the Fourth Proportional to 1,921.34, 2,880.07 and 750.62

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Solution

The fourth proportional to 1,921.34, 2,880.07 and 750.62 is: 1,125.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.34 : 2,880.07 = 750.62 : x
  2. Step 2: Convert to fraction form
    1,921.34/2,880.07 = 750.62/x
  3. Step 3: Cross multiply
    1,921.34x = 2,880.07 × 750.62
  4. Step 4: Simplify right side
    1,921.34x = 2,161,838.14
  5. Step 5: Solve for x
    x = 2,161,838.14/1,921.34
  6. Step 6: Final answer
    x = 1,125.17

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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.