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Finding the Fourth Proportional to 286,812.93, 430,215.75 and 128,929.77

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Solution

The fourth proportional to 286,812.93, 430,215.75 and 128,929.77 is: 193,393.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,812.93 : 430,215.75 = 128,929.77 : x
  2. Step 2: Convert to fraction form
    286,812.93/430,215.75 = 128,929.77/x
  3. Step 3: Cross multiply
    286,812.93x = 430,215.75 × 128,929.77
  4. Step 4: Simplify right side
    286,812.93x = 55,467,617,697.88
  5. Step 5: Solve for x
    x = 55,467,617,697.88/286,812.93
  6. Step 6: Final answer
    x = 193,393.02

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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.