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Finding the Fourth Proportional to 405,770.40, 607,489.20 and 248,306.40

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Solution

The fourth proportional to 405,770.40, 607,489.20 and 248,306.40 is: 371,745.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,770.40 : 607,489.20 = 248,306.40 : x
  2. Step 2: Convert to fraction form
    405,770.40/607,489.20 = 248,306.40/x
  3. Step 3: Cross multiply
    405,770.40x = 607,489.20 × 248,306.40
  4. Step 4: Simplify right side
    405,770.40x = 150,843,456,290.88
  5. Step 5: Solve for x
    x = 150,843,456,290.88/405,770.40
  6. Step 6: Final answer
    x = 371,745.84

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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.