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Finding the Fourth Proportional to 545,821.80, 818,732.70 and 305,689.20

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Solution

The fourth proportional to 545,821.80, 818,732.70 and 305,689.20 is: 458,533.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,821.80 : 818,732.70 = 305,689.20 : x
  2. Step 2: Convert to fraction form
    545,821.80/818,732.70 = 305,689.20/x
  3. Step 3: Cross multiply
    545,821.80x = 818,732.70 × 305,689.20
  4. Step 4: Simplify right side
    545,821.80x = 250,277,744,076.84
  5. Step 5: Solve for x
    x = 250,277,744,076.84/545,821.80
  6. Step 6: Final answer
    x = 458,533.80

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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.