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Finding the Fourth Proportional to 2,221.65, 3,332.54 and 760.79

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Solution

The fourth proportional to 2,221.65, 3,332.54 and 760.79 is: 1,141.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.65 : 3,332.54 = 760.79 : x
  2. Step 2: Convert to fraction form
    2,221.65/3,332.54 = 760.79/x
  3. Step 3: Cross multiply
    2,221.65x = 3,332.54 × 760.79
  4. Step 4: Simplify right side
    2,221.65x = 2,535,373.34
  5. Step 5: Solve for x
    x = 2,535,373.34/2,221.65
  6. Step 6: Final answer
    x = 1,141.21

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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.