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Finding the Fourth Proportional to 430,863.60, 646,392.32 and 131,374.45

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Solution

The fourth proportional to 430,863.60, 646,392.32 and 131,374.45 is: 197,091.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,863.60 : 646,392.32 = 131,374.45 : x
  2. Step 2: Convert to fraction form
    430,863.60/646,392.32 = 131,374.45/x
  3. Step 3: Cross multiply
    430,863.60x = 646,392.32 × 131,374.45
  4. Step 4: Simplify right side
    430,863.60x = 84,919,435,675.34
  5. Step 5: Solve for x
    x = 84,919,435,675.34/430,863.60
  6. Step 6: Final answer
    x = 197,091.23

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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.