Home / 920,641.05-1,380,961.69-280,948.14

Finding the Fourth Proportional to 920,641.05, 1,380,961.69 and 280,948.14

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Solution

The fourth proportional to 920,641.05, 1,380,961.69 and 280,948.14 is: 421,422.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,641.05 : 1,380,961.69 = 280,948.14 : x
  2. Step 2: Convert to fraction form
    920,641.05/1,380,961.69 = 280,948.14/x
  3. Step 3: Cross multiply
    920,641.05x = 1,380,961.69 × 280,948.14
  4. Step 4: Simplify right side
    920,641.05x = 387,978,622,692.99
  5. Step 5: Solve for x
    x = 387,978,622,692.99/920,641.05
  6. Step 6: Final answer
    x = 421,422.25

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1.5x scale

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.