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Finding the Fourth Proportional to 405,740.40, 608,610.60 and 216,783.60

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Solution

The fourth proportional to 405,740.40, 608,610.60 and 216,783.60 is: 325,175.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,740.40 : 608,610.60 = 216,783.60 : x
  2. Step 2: Convert to fraction form
    405,740.40/608,610.60 = 216,783.60/x
  3. Step 3: Cross multiply
    405,740.40x = 608,610.60 × 216,783.60
  4. Step 4: Simplify right side
    405,740.40x = 131,936,796,866.16
  5. Step 5: Solve for x
    x = 131,936,796,866.16/405,740.40
  6. Step 6: Final answer
    x = 325,175.40

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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.