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Finding the Fourth Proportional to 988,906.60, 1,482,711.90 and 389,506.60

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Solution

The fourth proportional to 988,906.60, 1,482,711.90 and 389,506.60 is: 584,004.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    988,906.60 : 1,482,711.90 = 389,506.60 : x
  2. Step 2: Convert to fraction form
    988,906.60/1,482,711.90 = 389,506.60/x
  3. Step 3: Cross multiply
    988,906.60x = 1,482,711.90 × 389,506.60
  4. Step 4: Simplify right side
    988,906.60x = 577,526,070,948.54
  5. Step 5: Solve for x
    x = 577,526,070,948.54/988,906.60
  6. Step 6: Final answer
    x = 584,004.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.