Home / 1,209,542,806.35-1,815,018,368.91-509,991,074.82

Finding the Fourth Proportional to 1,209,542,806.35, 1,815,018,368.91 and 509,991,074.82

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Solution

The fourth proportional to 1,209,542,806.35, 1,815,018,368.91 and 509,991,074.82 is: 765,283,513.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,542,806.35 : 1,815,018,368.91 = 509,991,074.82 : x
  2. Step 2: Convert to fraction form
    1,209,542,806.35/1,815,018,368.91 = 509,991,074.82/x
  3. Step 3: Cross multiply
    1,209,542,806.35x = 1,815,018,368.91 × 509,991,074.82
  4. Step 4: Simplify right side
    1,209,542,806.35x = 925,643,168,778,454,144
  5. Step 5: Solve for x
    x = 925,643,168,778,454,144/1,209,542,806.35
  6. Step 6: Final answer
    x = 765,283,513.67

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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.