Home / 2,148.03-3,221.76-761.40

Finding the Fourth Proportional to 2,148.03, 3,221.76 and 761.40

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Solution

The fourth proportional to 2,148.03, 3,221.76 and 761.40 is: 1,142.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.03 : 3,221.76 = 761.40 : x
  2. Step 2: Convert to fraction form
    2,148.03/3,221.76 = 761.40/x
  3. Step 3: Cross multiply
    2,148.03x = 3,221.76 × 761.40
  4. Step 4: Simplify right side
    2,148.03x = 2,453,048.06
  5. Step 5: Solve for x
    x = 2,453,048.06/2,148.03
  6. Step 6: Final answer
    x = 1,142.00

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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.