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Finding the Fourth Proportional to 867,662.40, 1,300,618.80 and 394,687.20

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Solution

The fourth proportional to 867,662.40, 1,300,618.80 and 394,687.20 is: 591,632.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,662.40 : 1,300,618.80 = 394,687.20 : x
  2. Step 2: Convert to fraction form
    867,662.40/1,300,618.80 = 394,687.20/x
  3. Step 3: Cross multiply
    867,662.40x = 1,300,618.80 × 394,687.20
  4. Step 4: Simplify right side
    867,662.40x = 513,337,592,439.36
  5. Step 5: Solve for x
    x = 513,337,592,439.36/867,662.40
  6. Step 6: Final answer
    x = 591,632.87

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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.