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Finding the Fourth Proportional to 609,901.60, 915,370.80 and 491,706.40

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Solution

The fourth proportional to 609,901.60, 915,370.80 and 491,706.40 is: 737,977.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,901.60 : 915,370.80 = 491,706.40 : x
  2. Step 2: Convert to fraction form
    609,901.60/915,370.80 = 491,706.40/x
  3. Step 3: Cross multiply
    609,901.60x = 915,370.80 × 491,706.40
  4. Step 4: Simplify right side
    609,901.60x = 450,093,680,733.12
  5. Step 5: Solve for x
    x = 450,093,680,733.12/609,901.60
  6. Step 6: Final answer
    x = 737,977.54

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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.