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Finding the Fourth Proportional to 610,428.60, 915,729.30 and 189,660.60

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Solution

The fourth proportional to 610,428.60, 915,729.30 and 189,660.60 is: 284,517.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,428.60 : 915,729.30 = 189,660.60 : x
  2. Step 2: Convert to fraction form
    610,428.60/915,729.30 = 189,660.60/x
  3. Step 3: Cross multiply
    610,428.60x = 915,729.30 × 189,660.60
  4. Step 4: Simplify right side
    610,428.60x = 173,677,768,475.58
  5. Step 5: Solve for x
    x = 173,677,768,475.58/610,428.60
  6. Step 6: Final answer
    x = 284,517.74

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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.