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Finding the Fourth Proportional to 287,199.05, 430,798.37 and 129,242.97

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Solution

The fourth proportional to 287,199.05, 430,798.37 and 129,242.97 is: 193,864.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,199.05 : 430,798.37 = 129,242.97 : x
  2. Step 2: Convert to fraction form
    287,199.05/430,798.37 = 129,242.97/x
  3. Step 3: Cross multiply
    287,199.05x = 430,798.37 × 129,242.97
  4. Step 4: Simplify right side
    287,199.05x = 55,677,660,163.74
  5. Step 5: Solve for x
    x = 55,677,660,163.74/287,199.05
  6. Step 6: Final answer
    x = 193,864.36

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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.