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Finding the Fourth Proportional to 851,257,346.40, 1,276,886,019.60 and 851,257,346.40

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Solution

The fourth proportional to 851,257,346.40, 1,276,886,019.60 and 851,257,346.40 is: 1,276,886,019.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,257,346.40 : 1,276,886,019.60 = 851,257,346.40 : x
  2. Step 2: Convert to fraction form
    851,257,346.40/1,276,886,019.60 = 851,257,346.40/x
  3. Step 3: Cross multiply
    851,257,346.40x = 1,276,886,019.60 × 851,257,346.40
  4. Step 4: Simplify right side
    851,257,346.40x = 1,086,958,604,699,954,304
  5. Step 5: Solve for x
    x = 1,086,958,604,699,954,304/851,257,346.40
  6. Step 6: Final answer
    x = 1,276,886,019.60

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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.