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Finding the Fourth Proportional to 412,820.40, 619,230.60 and 255,356.40

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Solution

The fourth proportional to 412,820.40, 619,230.60 and 255,356.40 is: 383,034.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,820.40 : 619,230.60 = 255,356.40 : x
  2. Step 2: Convert to fraction form
    412,820.40/619,230.60 = 255,356.40/x
  3. Step 3: Cross multiply
    412,820.40x = 619,230.60 × 255,356.40
  4. Step 4: Simplify right side
    412,820.40x = 158,124,496,785.84
  5. Step 5: Solve for x
    x = 158,124,496,785.84/412,820.40
  6. Step 6: Final answer
    x = 383,034.60

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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.