Home / 393,945.72-543,585.09-221,854.63

Finding the Fourth Proportional to 393,945.72, 543,585.09 and 221,854.63

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Solution

The fourth proportional to 393,945.72, 543,585.09 and 221,854.63 is: 306,125.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,945.72 : 543,585.09 = 221,854.63 : x
  2. Step 2: Convert to fraction form
    393,945.72/543,585.09 = 221,854.63/x
  3. Step 3: Cross multiply
    393,945.72x = 543,585.09 × 221,854.63
  4. Step 4: Simplify right side
    393,945.72x = 120,596,869,015.47
  5. Step 5: Solve for x
    x = 120,596,869,015.47/393,945.72
  6. Step 6: Final answer
    x = 306,125.60

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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.