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Finding the Fourth Proportional to 547,792.80, 821,689.20 and 311,596.80

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Solution

The fourth proportional to 547,792.80, 821,689.20 and 311,596.80 is: 467,395.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,792.80 : 821,689.20 = 311,596.80 : x
  2. Step 2: Convert to fraction form
    547,792.80/821,689.20 = 311,596.80/x
  3. Step 3: Cross multiply
    547,792.80x = 821,689.20 × 311,596.80
  4. Step 4: Simplify right side
    547,792.80x = 256,035,725,314.56
  5. Step 5: Solve for x
    x = 256,035,725,314.56/547,792.80
  6. Step 6: Final answer
    x = 467,395.20

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Similar ratio
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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.