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Finding the Fourth Proportional to 543,378.30, 815,441.16 and 188,392.32

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Solution

The fourth proportional to 543,378.30, 815,441.16 and 188,392.32 is: 282,718.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,378.30 : 815,441.16 = 188,392.32 : x
  2. Step 2: Convert to fraction form
    543,378.30/815,441.16 = 188,392.32/x
  3. Step 3: Cross multiply
    543,378.30x = 815,441.16 × 188,392.32
  4. Step 4: Simplify right side
    543,378.30x = 153,622,851,955.89
  5. Step 5: Solve for x
    x = 153,622,851,955.89/543,378.30
  6. Step 6: Final answer
    x = 282,718.05

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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.