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Finding the Fourth Proportional to 545,414.40, 818,121.60 and 171,437.40

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Solution

The fourth proportional to 545,414.40, 818,121.60 and 171,437.40 is: 257,156.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,414.40 : 818,121.60 = 171,437.40 : x
  2. Step 2: Convert to fraction form
    545,414.40/818,121.60 = 171,437.40/x
  3. Step 3: Cross multiply
    545,414.40x = 818,121.60 × 171,437.40
  4. Step 4: Simplify right side
    545,414.40x = 140,256,639,987.84
  5. Step 5: Solve for x
    x = 140,256,639,987.84/545,414.40
  6. Step 6: Final answer
    x = 257,156.10

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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.