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Finding the Fourth Proportional to 358,911.72, 538,461.04 and 134,289.72

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Solution

The fourth proportional to 358,911.72, 538,461.04 and 134,289.72 is: 201,469.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,911.72 : 538,461.04 = 134,289.72 : x
  2. Step 2: Convert to fraction form
    358,911.72/538,461.04 = 134,289.72/x
  3. Step 3: Cross multiply
    358,911.72x = 538,461.04 × 134,289.72
  4. Step 4: Simplify right side
    358,911.72x = 72,309,782,292.51
  5. Step 5: Solve for x
    x = 72,309,782,292.51/358,911.72
  6. Step 6: Final answer
    x = 201,469.55

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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.