Home / 728,400.90-1,092,212.55-307,200.90

Finding the Fourth Proportional to 728,400.90, 1,092,212.55 and 307,200.90

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Solution

The fourth proportional to 728,400.90, 1,092,212.55 and 307,200.90 is: 460,637.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,400.90 : 1,092,212.55 = 307,200.90 : x
  2. Step 2: Convert to fraction form
    728,400.90/1,092,212.55 = 307,200.90/x
  3. Step 3: Cross multiply
    728,400.90x = 1,092,212.55 × 307,200.90
  4. Step 4: Simplify right side
    728,400.90x = 335,528,678,351.30
  5. Step 5: Solve for x
    x = 335,528,678,351.30/728,400.90
  6. Step 6: Final answer
    x = 460,637.37

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Double scale
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Similar ratio
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1.5x scale

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.