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Finding the Fourth Proportional to 545,647.20, 818,470.80 and 171,621.60

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Solution

The fourth proportional to 545,647.20, 818,470.80 and 171,621.60 is: 257,432.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,647.20 : 818,470.80 = 171,621.60 : x
  2. Step 2: Convert to fraction form
    545,647.20/818,470.80 = 171,621.60/x
  3. Step 3: Cross multiply
    545,647.20x = 818,470.80 × 171,621.60
  4. Step 4: Simplify right side
    545,647.20x = 140,467,268,249.28
  5. Step 5: Solve for x
    x = 140,467,268,249.28/545,647.20
  6. Step 6: Final answer
    x = 257,432.40

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1.5x scale

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.