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Finding the Fourth Proportional to 492,966.40, 739,449.60 and 391,489.60

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Solution

The fourth proportional to 492,966.40, 739,449.60 and 391,489.60 is: 587,234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,966.40 : 739,449.60 = 391,489.60 : x
  2. Step 2: Convert to fraction form
    492,966.40/739,449.60 = 391,489.60/x
  3. Step 3: Cross multiply
    492,966.40x = 739,449.60 × 391,489.60
  4. Step 4: Simplify right side
    492,966.40x = 289,486,828,124.16
  5. Step 5: Solve for x
    x = 289,486,828,124.16/492,966.40
  6. Step 6: Final answer
    x = 587,234.40

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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.