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Finding the Fourth Proportional to 213,084.80, 320,404.80 and 178,870.40

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Solution

The fourth proportional to 213,084.80, 320,404.80 and 178,870.40 is: 268,958.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,084.80 : 320,404.80 = 178,870.40 : x
  2. Step 2: Convert to fraction form
    213,084.80/320,404.80 = 178,870.40/x
  3. Step 3: Cross multiply
    213,084.80x = 320,404.80 × 178,870.40
  4. Step 4: Simplify right side
    213,084.80x = 57,310,934,737.92
  5. Step 5: Solve for x
    x = 57,310,934,737.92/213,084.80
  6. Step 6: Final answer
    x = 268,958.34

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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.