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Finding the Fourth Proportional to 439,260, 606,243.84 and 278,130

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Solution

The fourth proportional to 439,260, 606,243.84 and 278,130 is: 383,860.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,260 : 606,243.84 = 278,130 : x
  2. Step 2: Convert to fraction form
    439,260/606,243.84 = 278,130/x
  3. Step 3: Cross multiply
    439,260x = 606,243.84 × 278,130
  4. Step 4: Simplify right side
    439,260x = 168,614,599,219.20
  5. Step 5: Solve for x
    x = 168,614,599,219.20/439,260
  6. Step 6: Final answer
    x = 383,860.58

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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.