Home / 920,373.50-1,380,769.38-280,734.45

Finding the Fourth Proportional to 920,373.50, 1,380,769.38 and 280,734.45

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Solution

The fourth proportional to 920,373.50, 1,380,769.38 and 280,734.45 is: 421,165.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,373.50 : 1,380,769.38 = 280,734.45 : x
  2. Step 2: Convert to fraction form
    920,373.50/1,380,769.38 = 280,734.45/x
  3. Step 3: Cross multiply
    920,373.50x = 1,380,769.38 × 280,734.45
  4. Step 4: Simplify right side
    920,373.50x = 387,629,532,471.14
  5. Step 5: Solve for x
    x = 387,629,532,471.14/920,373.50
  6. Step 6: Final answer
    x = 421,165.47

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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.