Home / 920,476.04-1,380,792.90-280,923.80

Finding the Fourth Proportional to 920,476.04, 1,380,792.90 and 280,923.80

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Solution

The fourth proportional to 920,476.04, 1,380,792.90 and 280,923.80 is: 421,409.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,476.04 : 1,380,792.90 = 280,923.80 : x
  2. Step 2: Convert to fraction form
    920,476.04/1,380,792.90 = 280,923.80/x
  3. Step 3: Cross multiply
    920,476.04x = 1,380,792.90 × 280,923.80
  4. Step 4: Simplify right side
    920,476.04x = 387,897,588,481.02
  5. Step 5: Solve for x
    x = 387,897,588,481.02/920,476.04
  6. Step 6: Final answer
    x = 421,409.76

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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.