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Finding the Fourth Proportional to 628,993,247.40, 943,489,871.10 and 518,028,366.60

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Solution

The fourth proportional to 628,993,247.40, 943,489,871.10 and 518,028,366.60 is: 777,042,549.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,993,247.40 : 943,489,871.10 = 518,028,366.60 : x
  2. Step 2: Convert to fraction form
    628,993,247.40/943,489,871.10 = 518,028,366.60/x
  3. Step 3: Cross multiply
    628,993,247.40x = 943,489,871.10 × 518,028,366.60
  4. Step 4: Simplify right side
    628,993,247.40x = 488,754,516,829,577,600
  5. Step 5: Solve for x
    x = 488,754,516,829,577,600/628,993,247.40
  6. Step 6: Final answer
    x = 777,042,549.90

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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.