Home / 1,129,904.78-1,694,857.17-420,111.50

Finding the Fourth Proportional to 1,129,904.78, 1,694,857.17 and 420,111.50

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Solution

The fourth proportional to 1,129,904.78, 1,694,857.17 and 420,111.50 is: 630,167.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129,904.78 : 1,694,857.17 = 420,111.50 : x
  2. Step 2: Convert to fraction form
    1,129,904.78/1,694,857.17 = 420,111.50/x
  3. Step 3: Cross multiply
    1,129,904.78x = 1,694,857.17 × 420,111.50
  4. Step 4: Simplify right side
    1,129,904.78x = 712,028,987,974.46
  5. Step 5: Solve for x
    x = 712,028,987,974.46/1,129,904.78
  6. Step 6: Final answer
    x = 630,167.25

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Double scale
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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.