Home / 428,032,920.20-590,699,969.88-408,419,758.40

Finding the Fourth Proportional to 428,032,920.20, 590,699,969.88 and 408,419,758.40

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Solution

The fourth proportional to 428,032,920.20, 590,699,969.88 and 408,419,758.40 is: 563,633,140.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,032,920.20 : 590,699,969.88 = 408,419,758.40 : x
  2. Step 2: Convert to fraction form
    428,032,920.20/590,699,969.88 = 408,419,758.40/x
  3. Step 3: Cross multiply
    428,032,920.20x = 590,699,969.88 × 408,419,758.40
  4. Step 4: Simplify right side
    428,032,920.20x = 241,253,538,985,276,864
  5. Step 5: Solve for x
    x = 241,253,538,985,276,864/428,032,920.20
  6. Step 6: Final answer
    x = 563,633,140.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.