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Finding the Fourth Proportional to 405,714.40, 608,744.40 and 256,069.60

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Solution

The fourth proportional to 405,714.40, 608,744.40 and 256,069.60 is: 384,213.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,714.40 : 608,744.40 = 256,069.60 : x
  2. Step 2: Convert to fraction form
    405,714.40/608,744.40 = 256,069.60/x
  3. Step 3: Cross multiply
    405,714.40x = 608,744.40 × 256,069.60
  4. Step 4: Simplify right side
    405,714.40x = 155,880,935,010.24
  5. Step 5: Solve for x
    x = 155,880,935,010.24/405,714.40
  6. Step 6: Final answer
    x = 384,213.46

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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.