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Finding the Fourth Proportional to 430,112.70, 645,300.30 and 219,898.26

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Solution

The fourth proportional to 430,112.70, 645,300.30 and 219,898.26 is: 329,914.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,112.70 : 645,300.30 = 219,898.26 : x
  2. Step 2: Convert to fraction form
    430,112.70/645,300.30 = 219,898.26/x
  3. Step 3: Cross multiply
    430,112.70x = 645,300.30 × 219,898.26
  4. Step 4: Simplify right side
    430,112.70x = 141,900,413,147.48
  5. Step 5: Solve for x
    x = 141,900,413,147.48/430,112.70
  6. Step 6: Final answer
    x = 329,914.49

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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.