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Finding the Fourth Proportional to 421,322.64, 628,789.26 and 404,176.56

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Solution

The fourth proportional to 421,322.64, 628,789.26 and 404,176.56 is: 603,200.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,322.64 : 628,789.26 = 404,176.56 : x
  2. Step 2: Convert to fraction form
    421,322.64/628,789.26 = 404,176.56/x
  3. Step 3: Cross multiply
    421,322.64x = 628,789.26 × 404,176.56
  4. Step 4: Simplify right side
    421,322.64x = 254,141,880,071.75
  5. Step 5: Solve for x
    x = 254,141,880,071.75/421,322.64
  6. Step 6: Final answer
    x = 603,200.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.