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Finding the Fourth Proportional to 545,989.80, 818,984.70 and 404,272.20

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Solution

The fourth proportional to 545,989.80, 818,984.70 and 404,272.20 is: 606,408.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,989.80 : 818,984.70 = 404,272.20 : x
  2. Step 2: Convert to fraction form
    545,989.80/818,984.70 = 404,272.20/x
  3. Step 3: Cross multiply
    545,989.80x = 818,984.70 × 404,272.20
  4. Step 4: Simplify right side
    545,989.80x = 331,092,746,435.34
  5. Step 5: Solve for x
    x = 331,092,746,435.34/545,989.80
  6. Step 6: Final answer
    x = 606,408.30

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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.