Home / 728,388.66-1,092,898.20-391,035.72

Finding the Fourth Proportional to 728,388.66, 1,092,898.20 and 391,035.72

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Solution

The fourth proportional to 728,388.66, 1,092,898.20 and 391,035.72 is: 586,722.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,388.66 : 1,092,898.20 = 391,035.72 : x
  2. Step 2: Convert to fraction form
    728,388.66/1,092,898.20 = 391,035.72/x
  3. Step 3: Cross multiply
    728,388.66x = 1,092,898.20 × 391,035.72
  4. Step 4: Simplify right side
    728,388.66x = 427,362,234,523.70
  5. Step 5: Solve for x
    x = 427,362,234,523.70/728,388.66
  6. Step 6: Final answer
    x = 586,722.80

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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.