Home / 1,209,542,807.35-1,815,018,370.41-509,991,075.82

Finding the Fourth Proportional to 1,209,542,807.35, 1,815,018,370.41 and 509,991,075.82

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Solution

The fourth proportional to 1,209,542,807.35, 1,815,018,370.41 and 509,991,075.82 is: 765,283,515.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,542,807.35 : 1,815,018,370.41 = 509,991,075.82 : x
  2. Step 2: Convert to fraction form
    1,209,542,807.35/1,815,018,370.41 = 509,991,075.82/x
  3. Step 3: Cross multiply
    1,209,542,807.35x = 1,815,018,370.41 × 509,991,075.82
  4. Step 4: Simplify right side
    1,209,542,807.35x = 925,643,171,358,459,136
  5. Step 5: Solve for x
    x = 925,643,171,358,459,136/1,209,542,807.35
  6. Step 6: Final answer
    x = 765,283,515.17

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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.