Home / 1,987,542.63-2,980,686.33-639,404.82

Finding the Fourth Proportional to 1,987,542.63, 2,980,686.33 and 639,404.82

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Solution

The fourth proportional to 1,987,542.63, 2,980,686.33 and 639,404.82 is: 958,905.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987,542.63 : 2,980,686.33 = 639,404.82 : x
  2. Step 2: Convert to fraction form
    1,987,542.63/2,980,686.33 = 639,404.82/x
  3. Step 3: Cross multiply
    1,987,542.63x = 2,980,686.33 × 639,404.82
  4. Step 4: Simplify right side
    1,987,542.63x = 1,905,865,206,310.11
  5. Step 5: Solve for x
    x = 1,905,865,206,310.11/1,987,542.63
  6. Step 6: Final answer
    x = 958,905.32

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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.