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Finding the Fourth Proportional to 260,496,653.80, 390,744,980.70 and 163,561,815.40

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Solution

The fourth proportional to 260,496,653.80, 390,744,980.70 and 163,561,815.40 is: 245,342,723.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,496,653.80 : 390,744,980.70 = 163,561,815.40 : x
  2. Step 2: Convert to fraction form
    260,496,653.80/390,744,980.70 = 163,561,815.40/x
  3. Step 3: Cross multiply
    260,496,653.80x = 390,744,980.70 × 163,561,815.40
  4. Step 4: Simplify right side
    260,496,653.80x = 63,910,958,401,729,960
  5. Step 5: Solve for x
    x = 63,910,958,401,729,960/260,496,653.80
  6. Step 6: Final answer
    x = 245,342,723.10

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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.