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Finding the Fourth Proportional to 405,639.60, 608,459.40 and 366,932.40

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Solution

The fourth proportional to 405,639.60, 608,459.40 and 366,932.40 is: 550,398.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,639.60 : 608,459.40 = 366,932.40 : x
  2. Step 2: Convert to fraction form
    405,639.60/608,459.40 = 366,932.40/x
  3. Step 3: Cross multiply
    405,639.60x = 608,459.40 × 366,932.40
  4. Step 4: Simplify right side
    405,639.60x = 223,263,467,944.56
  5. Step 5: Solve for x
    x = 223,263,467,944.56/405,639.60
  6. Step 6: Final answer
    x = 550,398.60

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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.