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Finding the Fourth Proportional to 713,408.37, 984,503.28 and 391,111.55

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Solution

The fourth proportional to 713,408.37, 984,503.28 and 391,111.55 is: 539,733.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,408.37 : 984,503.28 = 391,111.55 : x
  2. Step 2: Convert to fraction form
    713,408.37/984,503.28 = 391,111.55/x
  3. Step 3: Cross multiply
    713,408.37x = 984,503.28 × 391,111.55
  4. Step 4: Simplify right side
    713,408.37x = 385,050,603,820.88
  5. Step 5: Solve for x
    x = 385,050,603,820.88/713,408.37
  6. Step 6: Final answer
    x = 539,733.79

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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.