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Finding the Fourth Proportional to 317,596.82, 438,281.69 and 172,405.53

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Solution

The fourth proportional to 317,596.82, 438,281.69 and 172,405.53 is: 237,918.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,596.82 : 438,281.69 = 172,405.53 : x
  2. Step 2: Convert to fraction form
    317,596.82/438,281.69 = 172,405.53/x
  3. Step 3: Cross multiply
    317,596.82x = 438,281.69 × 172,405.53
  4. Step 4: Simplify right side
    317,596.82x = 75,562,186,191.72
  5. Step 5: Solve for x
    x = 75,562,186,191.72/317,596.82
  6. Step 6: Final answer
    x = 237,918.59

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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.