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Finding the Fourth Proportional to 391,885.32, 540,294.14 and 253,818.60

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Solution

The fourth proportional to 391,885.32, 540,294.14 and 253,818.60 is: 349,940.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,885.32 : 540,294.14 = 253,818.60 : x
  2. Step 2: Convert to fraction form
    391,885.32/540,294.14 = 253,818.60/x
  3. Step 3: Cross multiply
    391,885.32x = 540,294.14 × 253,818.60
  4. Step 4: Simplify right side
    391,885.32x = 137,136,702,203.00
  5. Step 5: Solve for x
    x = 137,136,702,203.00/391,885.32
  6. Step 6: Final answer
    x = 349,940.90

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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.