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Finding the Fourth Proportional to 312,228.45, 430,885.71 and 191,346.39

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Solution

The fourth proportional to 312,228.45, 430,885.71 and 191,346.39 is: 264,064.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,228.45 : 430,885.71 = 191,346.39 : x
  2. Step 2: Convert to fraction form
    312,228.45/430,885.71 = 191,346.39/x
  3. Step 3: Cross multiply
    312,228.45x = 430,885.71 × 191,346.39
  4. Step 4: Simplify right side
    312,228.45x = 82,448,425,111.09
  5. Step 5: Solve for x
    x = 82,448,425,111.09/312,228.45
  6. Step 6: Final answer
    x = 264,064.42

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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.