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Finding the Fourth Proportional to 311,911.85, 430,438.39 and 168,671.93

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Solution

The fourth proportional to 311,911.85, 430,438.39 and 168,671.93 is: 232,767.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,911.85 : 430,438.39 = 168,671.93 : x
  2. Step 2: Convert to fraction form
    311,911.85/430,438.39 = 168,671.93/x
  3. Step 3: Cross multiply
    311,911.85x = 430,438.39 × 168,671.93
  4. Step 4: Simplify right side
    311,911.85x = 72,602,871,413.52
  5. Step 5: Solve for x
    x = 72,602,871,413.52/311,911.85
  6. Step 6: Final answer
    x = 232,767.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.