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Finding the Fourth Proportional to 822,901.60, 1,234,352.40 and 261,992.80

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Solution

The fourth proportional to 822,901.60, 1,234,352.40 and 261,992.80 is: 392,989.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,901.60 : 1,234,352.40 = 261,992.80 : x
  2. Step 2: Convert to fraction form
    822,901.60/1,234,352.40 = 261,992.80/x
  3. Step 3: Cross multiply
    822,901.60x = 1,234,352.40 × 261,992.80
  4. Step 4: Simplify right side
    822,901.60x = 323,391,441,462.72
  5. Step 5: Solve for x
    x = 323,391,441,462.72/822,901.60
  6. Step 6: Final answer
    x = 392,989.20

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Half scale
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Double scale
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Similar ratio
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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.