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Finding the Fourth Proportional to 312,986.16, 431,417.88 and 244,885.68

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Solution

The fourth proportional to 312,986.16, 431,417.88 and 244,885.68 is: 337,548.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,986.16 : 431,417.88 = 244,885.68 : x
  2. Step 2: Convert to fraction form
    312,986.16/431,417.88 = 244,885.68/x
  3. Step 3: Cross multiply
    312,986.16x = 431,417.88 × 244,885.68
  4. Step 4: Simplify right side
    312,986.16x = 105,648,060,907.96
  5. Step 5: Solve for x
    x = 105,648,060,907.96/312,986.16
  6. Step 6: Final answer
    x = 337,548.67

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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.