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Finding the Fourth Proportional to 828,007.80, 1,242,011.70 and 820,134.60

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Solution

The fourth proportional to 828,007.80, 1,242,011.70 and 820,134.60 is: 1,230,201.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,007.80 : 1,242,011.70 = 820,134.60 : x
  2. Step 2: Convert to fraction form
    828,007.80/1,242,011.70 = 820,134.60/x
  3. Step 3: Cross multiply
    828,007.80x = 1,242,011.70 × 820,134.60
  4. Step 4: Simplify right side
    828,007.80x = 1,018,616,768,774.82
  5. Step 5: Solve for x
    x = 1,018,616,768,774.82/828,007.80
  6. Step 6: Final answer
    x = 1,230,201.90

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1.5x scale

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.