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Finding the Fourth Proportional to 405,378.48, 608,328.84 and 218,520.24

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Solution

The fourth proportional to 405,378.48, 608,328.84 and 218,520.24 is: 327,921.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,378.48 : 608,328.84 = 218,520.24 : x
  2. Step 2: Convert to fraction form
    405,378.48/608,328.84 = 218,520.24/x
  3. Step 3: Cross multiply
    405,378.48x = 608,328.84 × 218,520.24
  4. Step 4: Simplify right side
    405,378.48x = 132,932,164,115.72
  5. Step 5: Solve for x
    x = 132,932,164,115.72/405,378.48
  6. Step 6: Final answer
    x = 327,921.12

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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.