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Finding the Fourth Proportional to 344,085.20, 515,107.20 and 255,730.40

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Solution

The fourth proportional to 344,085.20, 515,107.20 and 255,730.40 is: 382,837.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    344,085.20 : 515,107.20 = 255,730.40 : x
  2. Step 2: Convert to fraction form
    344,085.20/515,107.20 = 255,730.40/x
  3. Step 3: Cross multiply
    344,085.20x = 515,107.20 × 255,730.40
  4. Step 4: Simplify right side
    344,085.20x = 131,728,570,298.88
  5. Step 5: Solve for x
    x = 131,728,570,298.88/344,085.20
  6. Step 6: Final answer
    x = 382,837.07

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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.