Home / 839,809,780.40-1,259,714,670.60-778,587,777.20

Finding the Fourth Proportional to 839,809,780.40, 1,259,714,670.60 and 778,587,777.20

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Solution

The fourth proportional to 839,809,780.40, 1,259,714,670.60 and 778,587,777.20 is: 1,167,881,665.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,809,780.40 : 1,259,714,670.60 = 778,587,777.20 : x
  2. Step 2: Convert to fraction form
    839,809,780.40/1,259,714,670.60 = 778,587,777.20/x
  3. Step 3: Cross multiply
    839,809,780.40x = 1,259,714,670.60 × 778,587,777.20
  4. Step 4: Simplify right side
    839,809,780.40x = 980,798,445,288,684,160
  5. Step 5: Solve for x
    x = 980,798,445,288,684,160/839,809,780.40
  6. Step 6: Final answer
    x = 1,167,881,665.80

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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.