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Finding the Fourth Proportional to 312,128.64, 430,734.42 and 168,885.54

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Solution

The fourth proportional to 312,128.64, 430,734.42 and 168,885.54 is: 233,060.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,128.64 : 430,734.42 = 168,885.54 : x
  2. Step 2: Convert to fraction form
    312,128.64/430,734.42 = 168,885.54/x
  3. Step 3: Cross multiply
    312,128.64x = 430,734.42 × 168,885.54
  4. Step 4: Simplify right side
    312,128.64x = 72,744,815,118.29
  5. Step 5: Solve for x
    x = 72,744,815,118.29/312,128.64
  6. Step 6: Final answer
    x = 233,060.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.