Home / 1,392,137,155.67-1,921,105,295.12-765,603,646.07

Finding the Fourth Proportional to 1,392,137,155.67, 1,921,105,295.12 and 765,603,646.07

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Solution

The fourth proportional to 1,392,137,155.67, 1,921,105,295.12 and 765,603,646.07 is: 1,056,508,845.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,137,155.67 : 1,921,105,295.12 = 765,603,646.07 : x
  2. Step 2: Convert to fraction form
    1,392,137,155.67/1,921,105,295.12 = 765,603,646.07/x
  3. Step 3: Cross multiply
    1,392,137,155.67x = 1,921,105,295.12 × 765,603,646.07
  4. Step 4: Simplify right side
    1,392,137,155.67x = 1,470,805,218,420,563,968
  5. Step 5: Solve for x
    x = 1,470,805,218,420,563,968/1,392,137,155.67
  6. Step 6: Final answer
    x = 1,056,508,845.01

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.