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Finding the Fourth Proportional to 840,756,502.80, 1,261,134,754.20 and 840,756,502.80

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Solution

The fourth proportional to 840,756,502.80, 1,261,134,754.20 and 840,756,502.80 is: 1,261,134,754.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,756,502.80 : 1,261,134,754.20 = 840,756,502.80 : x
  2. Step 2: Convert to fraction form
    840,756,502.80/1,261,134,754.20 = 840,756,502.80/x
  3. Step 3: Cross multiply
    840,756,502.80x = 1,261,134,754.20 × 840,756,502.80
  4. Step 4: Simplify right side
    840,756,502.80x = 1,060,307,245,500,729,600
  5. Step 5: Solve for x
    x = 1,060,307,245,500,729,600/840,756,502.80
  6. Step 6: Final answer
    x = 1,261,134,754.20

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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.