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Finding the Fourth Proportional to 405,692.80, 607,664.40 and 405,692.80

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Solution

The fourth proportional to 405,692.80, 607,664.40 and 405,692.80 is: 607,664.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,692.80 : 607,664.40 = 405,692.80 : x
  2. Step 2: Convert to fraction form
    405,692.80/607,664.40 = 405,692.80/x
  3. Step 3: Cross multiply
    405,692.80x = 607,664.40 × 405,692.80
  4. Step 4: Simplify right side
    405,692.80x = 246,525,071,896.32
  5. Step 5: Solve for x
    x = 246,525,071,896.32/405,692.80
  6. Step 6: Final answer
    x = 607,664.40

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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.