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Finding the Fourth Proportional to 280,703.20, 421,443.60 and 221,605.60

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Solution

The fourth proportional to 280,703.20, 421,443.60 and 221,605.60 is: 332,715.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,703.20 : 421,443.60 = 221,605.60 : x
  2. Step 2: Convert to fraction form
    280,703.20/421,443.60 = 221,605.60/x
  3. Step 3: Cross multiply
    280,703.20x = 421,443.60 × 221,605.60
  4. Step 4: Simplify right side
    280,703.20x = 93,394,261,844.16
  5. Step 5: Solve for x
    x = 93,394,261,844.16/280,703.20
  6. Step 6: Final answer
    x = 332,715.34

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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.