Home / 1,112,819.40-1,670,978.70-640,427.40

Finding the Fourth Proportional to 1,112,819.40, 1,670,978.70 and 640,427.40

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Solution

The fourth proportional to 1,112,819.40, 1,670,978.70 and 640,427.40 is: 961,647.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112,819.40 : 1,670,978.70 = 640,427.40 : x
  2. Step 2: Convert to fraction form
    1,112,819.40/1,670,978.70 = 640,427.40/x
  3. Step 3: Cross multiply
    1,112,819.40x = 1,670,978.70 × 640,427.40
  4. Step 4: Simplify right side
    1,112,819.40x = 1,070,140,544,296.38
  5. Step 5: Solve for x
    x = 1,070,140,544,296.38/1,112,819.40
  6. Step 6: Final answer
    x = 961,647.99

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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.