Home / 578,640.20-867,960.30-487,401.80

Finding the Fourth Proportional to 578,640.20, 867,960.30 and 487,401.80

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Solution

The fourth proportional to 578,640.20, 867,960.30 and 487,401.80 is: 731,102.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,640.20 : 867,960.30 = 487,401.80 : x
  2. Step 2: Convert to fraction form
    578,640.20/867,960.30 = 487,401.80/x
  3. Step 3: Cross multiply
    578,640.20x = 867,960.30 × 487,401.80
  4. Step 4: Simplify right side
    578,640.20x = 423,045,412,548.54
  5. Step 5: Solve for x
    x = 423,045,412,548.54/578,640.20
  6. Step 6: Final answer
    x = 731,102.70

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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.