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Finding the Fourth Proportional to 412,321.40, 578,079.40 and 412,321.40

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Solution

The fourth proportional to 412,321.40, 578,079.40 and 412,321.40 is: 578,079.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,321.40 : 578,079.40 = 412,321.40 : x
  2. Step 2: Convert to fraction form
    412,321.40/578,079.40 = 412,321.40/x
  3. Step 3: Cross multiply
    412,321.40x = 578,079.40 × 412,321.40
  4. Step 4: Simplify right side
    412,321.40x = 238,354,507,519.16
  5. Step 5: Solve for x
    x = 238,354,507,519.16/412,321.40
  6. Step 6: Final answer
    x = 578,079.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.