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Finding the Fourth Proportional to 405,270.20, 607,905.30 and 326,538.20

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Solution

The fourth proportional to 405,270.20, 607,905.30 and 326,538.20 is: 489,807.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,270.20 : 607,905.30 = 326,538.20 : x
  2. Step 2: Convert to fraction form
    405,270.20/607,905.30 = 326,538.20/x
  3. Step 3: Cross multiply
    405,270.20x = 607,905.30 × 326,538.20
  4. Step 4: Simplify right side
    405,270.20x = 198,504,302,432.46
  5. Step 5: Solve for x
    x = 198,504,302,432.46/405,270.20
  6. Step 6: Final answer
    x = 489,807.30

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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.