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Finding the Fourth Proportional to 393,576.10, 543,038.64 and 221,460.50

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Solution

The fourth proportional to 393,576.10, 543,038.64 and 221,460.50 is: 305,561.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,576.10 : 543,038.64 = 221,460.50 : x
  2. Step 2: Convert to fraction form
    393,576.10/543,038.64 = 221,460.50/x
  3. Step 3: Cross multiply
    393,576.10x = 543,038.64 × 221,460.50
  4. Step 4: Simplify right side
    393,576.10x = 120,261,608,733.72
  5. Step 5: Solve for x
    x = 120,261,608,733.72/393,576.10
  6. Step 6: Final answer
    x = 305,561.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.