Home / 428,749,752.80-643,124,629.20-265,491,077.60

Finding the Fourth Proportional to 428,749,752.80, 643,124,629.20 and 265,491,077.60

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Solution

The fourth proportional to 428,749,752.80, 643,124,629.20 and 265,491,077.60 is: 398,236,616.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,749,752.80 : 643,124,629.20 = 265,491,077.60 : x
  2. Step 2: Convert to fraction form
    428,749,752.80/643,124,629.20 = 265,491,077.60/x
  3. Step 3: Cross multiply
    428,749,752.80x = 643,124,629.20 × 265,491,077.60
  4. Step 4: Simplify right side
    428,749,752.80x = 170,743,850,837,408,448
  5. Step 5: Solve for x
    x = 170,743,850,837,408,448/428,749,752.80
  6. Step 6: Final answer
    x = 398,236,616.40

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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.