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Finding the Fourth Proportional to 255,628.80, 383,443.20 and 193,420.80

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Solution

The fourth proportional to 255,628.80, 383,443.20 and 193,420.80 is: 290,131.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,628.80 : 383,443.20 = 193,420.80 : x
  2. Step 2: Convert to fraction form
    255,628.80/383,443.20 = 193,420.80/x
  3. Step 3: Cross multiply
    255,628.80x = 383,443.20 × 193,420.80
  4. Step 4: Simplify right side
    255,628.80x = 74,165,890,498.56
  5. Step 5: Solve for x
    x = 74,165,890,498.56/255,628.80
  6. Step 6: Final answer
    x = 290,131.20

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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.