Home / 428,002,585.40-641,801,524.54-165,809,967.91

Finding the Fourth Proportional to 428,002,585.40, 641,801,524.54 and 165,809,967.91

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Solution

The fourth proportional to 428,002,585.40, 641,801,524.54 and 165,809,967.91 is: 248,636,559.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,002,585.40 : 641,801,524.54 = 165,809,967.91 : x
  2. Step 2: Convert to fraction form
    428,002,585.40/641,801,524.54 = 165,809,967.91/x
  3. Step 3: Cross multiply
    428,002,585.40x = 641,801,524.54 × 165,809,967.91
  4. Step 4: Simplify right side
    428,002,585.40x = 106,417,090,187,747,440
  5. Step 5: Solve for x
    x = 106,417,090,187,747,440/428,002,585.40
  6. Step 6: Final answer
    x = 248,636,559.26

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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.