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Finding the Fourth Proportional to 578,540.80, 867,811.20 and 369,107.20

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Solution

The fourth proportional to 578,540.80, 867,811.20 and 369,107.20 is: 553,660.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,540.80 : 867,811.20 = 369,107.20 : x
  2. Step 2: Convert to fraction form
    578,540.80/867,811.20 = 369,107.20/x
  3. Step 3: Cross multiply
    578,540.80x = 867,811.20 × 369,107.20
  4. Step 4: Simplify right side
    578,540.80x = 320,315,362,160.64
  5. Step 5: Solve for x
    x = 320,315,362,160.64/578,540.80
  6. Step 6: Final answer
    x = 553,660.80

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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.