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Finding the Fourth Proportional to 822,429.60, 1,233,644.40 and 261,520.80

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Solution

The fourth proportional to 822,429.60, 1,233,644.40 and 261,520.80 is: 392,281.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,429.60 : 1,233,644.40 = 261,520.80 : x
  2. Step 2: Convert to fraction form
    822,429.60/1,233,644.40 = 261,520.80/x
  3. Step 3: Cross multiply
    822,429.60x = 1,233,644.40 × 261,520.80
  4. Step 4: Simplify right side
    822,429.60x = 322,623,670,403.52
  5. Step 5: Solve for x
    x = 322,623,670,403.52/822,429.60
  6. Step 6: Final answer
    x = 392,281.20

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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.