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Finding the Fourth Proportional to 309,029.76, 462,760.56 and 258,978.24

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Solution

The fourth proportional to 309,029.76, 462,760.56 and 258,978.24 is: 387,810.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,029.76 : 462,760.56 = 258,978.24 : x
  2. Step 2: Convert to fraction form
    309,029.76/462,760.56 = 258,978.24/x
  3. Step 3: Cross multiply
    309,029.76x = 462,760.56 × 258,978.24
  4. Step 4: Simplify right side
    309,029.76x = 119,844,915,370.21
  5. Step 5: Solve for x
    x = 119,844,915,370.21/309,029.76
  6. Step 6: Final answer
    x = 387,810.27

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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.