Home / 289,501.71-399,512.09-162,178.22

Finding the Fourth Proportional to 289,501.71, 399,512.09 and 162,178.22

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Solution

The fourth proportional to 289,501.71, 399,512.09 and 162,178.22 is: 223,805.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,501.71 : 399,512.09 = 162,178.22 : x
  2. Step 2: Convert to fraction form
    289,501.71/399,512.09 = 162,178.22/x
  3. Step 3: Cross multiply
    289,501.71x = 399,512.09 × 162,178.22
  4. Step 4: Simplify right side
    289,501.71x = 64,792,156,816.23
  5. Step 5: Solve for x
    x = 64,792,156,816.23/289,501.71
  6. Step 6: Final answer
    x = 223,805.78

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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.