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Finding the Fourth Proportional to 578,628.80, 867,986.40 and 204,603.20

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Solution

The fourth proportional to 578,628.80, 867,986.40 and 204,603.20 is: 306,920.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,628.80 : 867,986.40 = 204,603.20 : x
  2. Step 2: Convert to fraction form
    578,628.80/867,986.40 = 204,603.20/x
  3. Step 3: Cross multiply
    578,628.80x = 867,986.40 × 204,603.20
  4. Step 4: Simplify right side
    578,628.80x = 177,592,794,996.48
  5. Step 5: Solve for x
    x = 177,592,794,996.48/578,628.80
  6. Step 6: Final answer
    x = 306,920.08

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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.