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Finding the Fourth Proportional to 286,599.06, 430,015.23 and 128,901.78

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Solution

The fourth proportional to 286,599.06, 430,015.23 and 128,901.78 is: 193,405.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,599.06 : 430,015.23 = 128,901.78 : x
  2. Step 2: Convert to fraction form
    286,599.06/430,015.23 = 128,901.78/x
  3. Step 3: Cross multiply
    286,599.06x = 430,015.23 × 128,901.78
  4. Step 4: Simplify right side
    286,599.06x = 55,429,728,574.11
  5. Step 5: Solve for x
    x = 55,429,728,574.11/286,599.06
  6. Step 6: Final answer
    x = 193,405.13

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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.