Home / 728,938.20-1,089,908.10-539,981.40

Finding the Fourth Proportional to 728,938.20, 1,089,908.10 and 539,981.40

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Solution

The fourth proportional to 728,938.20, 1,089,908.10 and 539,981.40 is: 807,379.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,938.20 : 1,089,908.10 = 539,981.40 : x
  2. Step 2: Convert to fraction form
    728,938.20/1,089,908.10 = 539,981.40/x
  3. Step 3: Cross multiply
    728,938.20x = 1,089,908.10 × 539,981.40
  4. Step 4: Simplify right side
    728,938.20x = 588,530,101,709.34
  5. Step 5: Solve for x
    x = 588,530,101,709.34/728,938.20
  6. Step 6: Final answer
    x = 807,379.97

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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.