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Finding the Fourth Proportional to 676,353.60, 933,343.20 and 389,885.76

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Solution

The fourth proportional to 676,353.60, 933,343.20 and 389,885.76 is: 538,028.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,353.60 : 933,343.20 = 389,885.76 : x
  2. Step 2: Convert to fraction form
    676,353.60/933,343.20 = 389,885.76/x
  3. Step 3: Cross multiply
    676,353.60x = 933,343.20 × 389,885.76
  4. Step 4: Simplify right side
    676,353.60x = 363,897,222,872.83
  5. Step 5: Solve for x
    x = 363,897,222,872.83/676,353.60
  6. Step 6: Final answer
    x = 538,028.07

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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.