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Finding the Fourth Proportional to 421,405,900.80, 581,562,708.48 and 235,755,847.68

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Solution

The fourth proportional to 421,405,900.80, 581,562,708.48 and 235,755,847.68 is: 325,355,694.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,405,900.80 : 581,562,708.48 = 235,755,847.68 : x
  2. Step 2: Convert to fraction form
    421,405,900.80/581,562,708.48 = 235,755,847.68/x
  3. Step 3: Cross multiply
    421,405,900.80x = 581,562,708.48 × 235,755,847.68
  4. Step 4: Simplify right side
    421,405,900.80x = 137,106,809,316,779,136
  5. Step 5: Solve for x
    x = 137,106,809,316,779,136/421,405,900.80
  6. Step 6: Final answer
    x = 325,355,694.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.