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Finding the Fourth Proportional to 387,200.40, 580,800.60 and 303,219.60

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Solution

The fourth proportional to 387,200.40, 580,800.60 and 303,219.60 is: 454,829.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,200.40 : 580,800.60 = 303,219.60 : x
  2. Step 2: Convert to fraction form
    387,200.40/580,800.60 = 303,219.60/x
  3. Step 3: Cross multiply
    387,200.40x = 580,800.60 × 303,219.60
  4. Step 4: Simplify right side
    387,200.40x = 176,110,125,611.76
  5. Step 5: Solve for x
    x = 176,110,125,611.76/387,200.40
  6. Step 6: Final answer
    x = 454,829.40

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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.