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Finding the Fourth Proportional to 421,693,996.16, 581,528,887.92 and 328,840,624.64

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Solution

The fourth proportional to 421,693,996.16, 581,528,887.92 and 328,840,624.64 is: 453,481,255.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,693,996.16 : 581,528,887.92 = 328,840,624.64 : x
  2. Step 2: Convert to fraction form
    421,693,996.16/581,528,887.92 = 328,840,624.64/x
  3. Step 3: Cross multiply
    421,693,996.16x = 581,528,887.92 × 328,840,624.64
  4. Step 4: Simplify right side
    421,693,996.16x = 191,230,322,749,817,312
  5. Step 5: Solve for x
    x = 191,230,322,749,817,312/421,693,996.16
  6. Step 6: Final answer
    x = 453,481,255.34

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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.