Home / 1,391,495.28-2,087,540.82-431,929.82

Finding the Fourth Proportional to 1,391,495.28, 2,087,540.82 and 431,929.82

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Solution

The fourth proportional to 1,391,495.28, 2,087,540.82 and 431,929.82 is: 647,987.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,495.28 : 2,087,540.82 = 431,929.82 : x
  2. Step 2: Convert to fraction form
    1,391,495.28/2,087,540.82 = 431,929.82/x
  3. Step 3: Cross multiply
    1,391,495.28x = 2,087,540.82 × 431,929.82
  4. Step 4: Simplify right side
    1,391,495.28x = 901,671,120,187.55
  5. Step 5: Solve for x
    x = 901,671,120,187.55/1,391,495.28
  6. Step 6: Final answer
    x = 647,987.19

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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.