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Finding the Fourth Proportional to 388,886.91, 583,330.38 and 122,668.21

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Solution

The fourth proportional to 388,886.91, 583,330.38 and 122,668.21 is: 184,002.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,886.91 : 583,330.38 = 122,668.21 : x
  2. Step 2: Convert to fraction form
    388,886.91/583,330.38 = 122,668.21/x
  3. Step 3: Cross multiply
    388,886.91x = 583,330.38 × 122,668.21
  4. Step 4: Simplify right side
    388,886.91x = 71,556,093,553.22
  5. Step 5: Solve for x
    x = 71,556,093,553.22/388,886.91
  6. Step 6: Final answer
    x = 184,002.32

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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.