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Finding the Fourth Proportional to 317,970.39, 438,801.54 and 172,777.56

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Solution

The fourth proportional to 317,970.39, 438,801.54 and 172,777.56 is: 238,434.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,970.39 : 438,801.54 = 172,777.56 : x
  2. Step 2: Convert to fraction form
    317,970.39/438,801.54 = 172,777.56/x
  3. Step 3: Cross multiply
    317,970.39x = 438,801.54 × 172,777.56
  4. Step 4: Simplify right side
    317,970.39x = 75,815,059,405.44
  5. Step 5: Solve for x
    x = 75,815,059,405.44/317,970.39
  6. Step 6: Final answer
    x = 238,434.34

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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.