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Finding the Fourth Proportional to 839,809,747.60, 1,259,714,621.40 and 778,587,744.40

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Solution

The fourth proportional to 839,809,747.60, 1,259,714,621.40 and 778,587,744.40 is: 1,167,881,616.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,809,747.60 : 1,259,714,621.40 = 778,587,744.40 : x
  2. Step 2: Convert to fraction form
    839,809,747.60/1,259,714,621.40 = 778,587,744.40/x
  3. Step 3: Cross multiply
    839,809,747.60x = 1,259,714,621.40 × 778,587,744.40
  4. Step 4: Simplify right side
    839,809,747.60x = 980,798,365,663,526,016
  5. Step 5: Solve for x
    x = 980,798,365,663,526,016/839,809,747.60
  6. Step 6: Final answer
    x = 1,167,881,616.60

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1.5x scale

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.