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Finding the Fourth Proportional to 822,399.60, 1,233,599.40 and 261,490.80

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Solution

The fourth proportional to 822,399.60, 1,233,599.40 and 261,490.80 is: 392,236.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,399.60 : 1,233,599.40 = 261,490.80 : x
  2. Step 2: Convert to fraction form
    822,399.60/1,233,599.40 = 261,490.80/x
  3. Step 3: Cross multiply
    822,399.60x = 1,233,599.40 × 261,490.80
  4. Step 4: Simplify right side
    822,399.60x = 322,574,893,985.52
  5. Step 5: Solve for x
    x = 322,574,893,985.52/822,399.60
  6. Step 6: Final answer
    x = 392,236.20

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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.