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Finding the Fourth Proportional to 312,175.77, 430,805.60 and 168,938.79

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Solution

The fourth proportional to 312,175.77, 430,805.60 and 168,938.79 is: 233,137.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,175.77 : 430,805.60 = 168,938.79 : x
  2. Step 2: Convert to fraction form
    312,175.77/430,805.60 = 168,938.79/x
  3. Step 3: Cross multiply
    312,175.77x = 430,805.60 × 168,938.79
  4. Step 4: Simplify right side
    312,175.77x = 72,779,776,789.22
  5. Step 5: Solve for x
    x = 72,779,776,789.22/312,175.77
  6. Step 6: Final answer
    x = 233,137.17

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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.