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Finding the Fourth Proportional to 641,339,690.40, 885,059,060.40 and 347,984,258.40

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Solution

The fourth proportional to 641,339,690.40, 885,059,060.40 and 347,984,258.40 is: 480,223,858.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,339,690.40 : 885,059,060.40 = 347,984,258.40 : x
  2. Step 2: Convert to fraction form
    641,339,690.40/885,059,060.40 = 347,984,258.40/x
  3. Step 3: Cross multiply
    641,339,690.40x = 885,059,060.40 × 347,984,258.40
  4. Step 4: Simplify right side
    641,339,690.40x = 307,986,620,773,494,784
  5. Step 5: Solve for x
    x = 307,986,620,773,494,784/641,339,690.40
  6. Step 6: Final answer
    x = 480,223,858.56

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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.