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Finding the Fourth Proportional to 792,892.80, 1,189,096.20 and 260,290.80

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Solution

The fourth proportional to 792,892.80, 1,189,096.20 and 260,290.80 is: 390,356.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    792,892.80 : 1,189,096.20 = 260,290.80 : x
  2. Step 2: Convert to fraction form
    792,892.80/1,189,096.20 = 260,290.80/x
  3. Step 3: Cross multiply
    792,892.80x = 1,189,096.20 × 260,290.80
  4. Step 4: Simplify right side
    792,892.80x = 309,510,801,174.96
  5. Step 5: Solve for x
    x = 309,510,801,174.96/792,892.80
  6. Step 6: Final answer
    x = 390,356.43

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Double scale
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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.