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Finding the Fourth Proportional to 396,872,657.60, 595,308,986.40 and 287,183,235.20

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Solution

The fourth proportional to 396,872,657.60, 595,308,986.40 and 287,183,235.20 is: 430,774,852.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,872,657.60 : 595,308,986.40 = 287,183,235.20 : x
  2. Step 2: Convert to fraction form
    396,872,657.60/595,308,986.40 = 287,183,235.20/x
  3. Step 3: Cross multiply
    396,872,657.60x = 595,308,986.40 × 287,183,235.20
  4. Step 4: Simplify right side
    396,872,657.60x = 170,962,760,657,984,800
  5. Step 5: Solve for x
    x = 170,962,760,657,984,800/396,872,657.60
  6. Step 6: Final answer
    x = 430,774,852.80

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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.