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Finding the Fourth Proportional to 863,138,936.60, 1,294,708,404.90 and 791,713,266.20

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Solution

The fourth proportional to 863,138,936.60, 1,294,708,404.90 and 791,713,266.20 is: 1,187,569,899.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,138,936.60 : 1,294,708,404.90 = 791,713,266.20 : x
  2. Step 2: Convert to fraction form
    863,138,936.60/1,294,708,404.90 = 791,713,266.20/x
  3. Step 3: Cross multiply
    863,138,936.60x = 1,294,708,404.90 × 791,713,266.20
  4. Step 4: Simplify right side
    863,138,936.60x = 1,025,037,820,019,971,200
  5. Step 5: Solve for x
    x = 1,025,037,820,019,971,200/863,138,936.60
  6. Step 6: Final answer
    x = 1,187,569,899.30

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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.