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Finding the Fourth Proportional to 579,765.80, 870,080.70 and 299,138.60

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Solution

The fourth proportional to 579,765.80, 870,080.70 and 299,138.60 is: 448,930.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,765.80 : 870,080.70 = 299,138.60 : x
  2. Step 2: Convert to fraction form
    579,765.80/870,080.70 = 299,138.60/x
  3. Step 3: Cross multiply
    579,765.80x = 870,080.70 × 299,138.60
  4. Step 4: Simplify right side
    579,765.80x = 260,274,722,485.02
  5. Step 5: Solve for x
    x = 260,274,722,485.02/579,765.80
  6. Step 6: Final answer
    x = 448,930.80

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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.