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Finding the Fourth Proportional to 200,428.46, 276,458.36 and 128,898.98

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Solution

The fourth proportional to 200,428.46, 276,458.36 and 128,898.98 is: 177,795.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,428.46 : 276,458.36 = 128,898.98 : x
  2. Step 2: Convert to fraction form
    200,428.46/276,458.36 = 128,898.98/x
  3. Step 3: Cross multiply
    200,428.46x = 276,458.36 × 128,898.98
  4. Step 4: Simplify right side
    200,428.46x = 35,635,200,616.47
  5. Step 5: Solve for x
    x = 35,635,200,616.47/200,428.46
  6. Step 6: Final answer
    x = 177,795.11

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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.