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Finding the Fourth Proportional to 545,216.40, 815,880.60 and 345,632.40

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Solution

The fourth proportional to 545,216.40, 815,880.60 and 345,632.40 is: 517,216.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,216.40 : 815,880.60 = 345,632.40 : x
  2. Step 2: Convert to fraction form
    545,216.40/815,880.60 = 345,632.40/x
  3. Step 3: Cross multiply
    545,216.40x = 815,880.60 × 345,632.40
  4. Step 4: Simplify right side
    545,216.40x = 281,994,769,891.44
  5. Step 5: Solve for x
    x = 281,994,769,891.44/545,216.40
  6. Step 6: Final answer
    x = 517,216.23

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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.