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Finding the Fourth Proportional to 412,817.40, 619,226.10 and 255,353.40

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Solution

The fourth proportional to 412,817.40, 619,226.10 and 255,353.40 is: 383,030.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,817.40 : 619,226.10 = 255,353.40 : x
  2. Step 2: Convert to fraction form
    412,817.40/619,226.10 = 255,353.40/x
  3. Step 3: Cross multiply
    412,817.40x = 619,226.10 × 255,353.40
  4. Step 4: Simplify right side
    412,817.40x = 158,121,490,003.74
  5. Step 5: Solve for x
    x = 158,121,490,003.74/412,817.40
  6. Step 6: Final answer
    x = 383,030.10

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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.