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Finding the Fourth Proportional to 391,700.89, 540,498.85 and 238,683.32

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Solution

The fourth proportional to 391,700.89, 540,498.85 and 238,683.32 is: 329,353.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,700.89 : 540,498.85 = 238,683.32 : x
  2. Step 2: Convert to fraction form
    391,700.89/540,498.85 = 238,683.32/x
  3. Step 3: Cross multiply
    391,700.89x = 540,498.85 × 238,683.32
  4. Step 4: Simplify right side
    391,700.89x = 129,008,056,674.98
  5. Step 5: Solve for x
    x = 129,008,056,674.98/391,700.89
  6. Step 6: Final answer
    x = 329,353.50

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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.