Home / 820,105.40-1,230,158.10-788,612.60

Finding the Fourth Proportional to 820,105.40, 1,230,158.10 and 788,612.60

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Solution

The fourth proportional to 820,105.40, 1,230,158.10 and 788,612.60 is: 1,182,918.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,105.40 : 1,230,158.10 = 788,612.60 : x
  2. Step 2: Convert to fraction form
    820,105.40/1,230,158.10 = 788,612.60/x
  3. Step 3: Cross multiply
    820,105.40x = 1,230,158.10 × 788,612.60
  4. Step 4: Simplify right side
    820,105.40x = 970,118,177,652.06
  5. Step 5: Solve for x
    x = 970,118,177,652.06/820,105.40
  6. Step 6: Final answer
    x = 1,182,918.90

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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.