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Finding the Fourth Proportional to 430,372.89, 645,595.47 and 130,856.07

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Solution

The fourth proportional to 430,372.89, 645,595.47 and 130,856.07 is: 196,295.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,372.89 : 645,595.47 = 130,856.07 : x
  2. Step 2: Convert to fraction form
    430,372.89/645,595.47 = 130,856.07/x
  3. Step 3: Cross multiply
    430,372.89x = 645,595.47 × 130,856.07
  4. Step 4: Simplify right side
    430,372.89x = 84,480,085,359.72
  5. Step 5: Solve for x
    x = 84,480,085,359.72/430,372.89
  6. Step 6: Final answer
    x = 196,295.09

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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.