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Finding the Fourth Proportional to 421,253,999.60, 631,030,693.80 and 421,253,999.60

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Solution

The fourth proportional to 421,253,999.60, 631,030,693.80 and 421,253,999.60 is: 631,030,693.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,253,999.60 : 631,030,693.80 = 421,253,999.60 : x
  2. Step 2: Convert to fraction form
    421,253,999.60/631,030,693.80 = 421,253,999.60/x
  3. Step 3: Cross multiply
    421,253,999.60x = 631,030,693.80 × 421,253,999.60
  4. Step 4: Simplify right side
    421,253,999.60x = 265,824,203,633,612,928
  5. Step 5: Solve for x
    x = 265,824,203,633,612,928/421,253,999.60
  6. Step 6: Final answer
    x = 631,030,693.80

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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.