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Finding the Fourth Proportional to 450,039.46, 620,761.82 and 288,638.86

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Solution

The fourth proportional to 450,039.46, 620,761.82 and 288,638.86 is: 398,133.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,039.46 : 620,761.82 = 288,638.86 : x
  2. Step 2: Convert to fraction form
    450,039.46/620,761.82 = 288,638.86/x
  3. Step 3: Cross multiply
    450,039.46x = 620,761.82 × 288,638.86
  4. Step 4: Simplify right side
    450,039.46x = 179,175,984,056.33
  5. Step 5: Solve for x
    x = 179,175,984,056.33/450,039.46
  6. Step 6: Final answer
    x = 398,133.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.