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Finding the Fourth Proportional to 405,165.60, 607,748.40 and 279,194.40

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Solution

The fourth proportional to 405,165.60, 607,748.40 and 279,194.40 is: 418,791.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,165.60 : 607,748.40 = 279,194.40 : x
  2. Step 2: Convert to fraction form
    405,165.60/607,748.40 = 279,194.40/x
  3. Step 3: Cross multiply
    405,165.60x = 607,748.40 × 279,194.40
  4. Step 4: Simplify right side
    405,165.60x = 169,679,949,888.96
  5. Step 5: Solve for x
    x = 169,679,949,888.96/405,165.60
  6. Step 6: Final answer
    x = 418,791.60

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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.