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Finding the Fourth Proportional to 45,914.40, 68,914.80 and 28,418.40

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Solution

The fourth proportional to 45,914.40, 68,914.80 and 28,418.40 is: 42,654.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,914.40 : 68,914.80 = 28,418.40 : x
  2. Step 2: Convert to fraction form
    45,914.40/68,914.80 = 28,418.40/x
  3. Step 3: Cross multiply
    45,914.40x = 68,914.80 × 28,418.40
  4. Step 4: Simplify right side
    45,914.40x = 1,958,448,352.32
  5. Step 5: Solve for x
    x = 1,958,448,352.32/45,914.40
  6. Step 6: Final answer
    x = 42,654.34

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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.