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Finding the Fourth Proportional to 545,428.40, 818,142.60 and 171,451.40

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Solution

The fourth proportional to 545,428.40, 818,142.60 and 171,451.40 is: 257,177.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,428.40 : 818,142.60 = 171,451.40 : x
  2. Step 2: Convert to fraction form
    545,428.40/818,142.60 = 171,451.40/x
  3. Step 3: Cross multiply
    545,428.40x = 818,142.60 × 171,451.40
  4. Step 4: Simplify right side
    545,428.40x = 140,271,694,169.64
  5. Step 5: Solve for x
    x = 140,271,694,169.64/545,428.40
  6. Step 6: Final answer
    x = 257,177.10

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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.