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Finding the Fourth Proportional to 713,636.85, 984,820.14 and 391,349.25

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Solution

The fourth proportional to 713,636.85, 984,820.14 and 391,349.25 is: 540,062.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,636.85 : 984,820.14 = 391,349.25 : x
  2. Step 2: Convert to fraction form
    713,636.85/984,820.14 = 391,349.25/x
  3. Step 3: Cross multiply
    713,636.85x = 984,820.14 × 391,349.25
  4. Step 4: Simplify right side
    713,636.85x = 385,408,623,173.90
  5. Step 5: Solve for x
    x = 385,408,623,173.90/713,636.85
  6. Step 6: Final answer
    x = 540,062.67

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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.