Home / 725,749.90-1,001,658.60-420,012.43

Finding the Fourth Proportional to 725,749.90, 1,001,658.60 and 420,012.43

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Solution

The fourth proportional to 725,749.90, 1,001,658.60 and 420,012.43 is: 579,688.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,749.90 : 1,001,658.60 = 420,012.43 : x
  2. Step 2: Convert to fraction form
    725,749.90/1,001,658.60 = 420,012.43/x
  3. Step 3: Cross multiply
    725,749.90x = 1,001,658.60 × 420,012.43
  4. Step 4: Simplify right side
    725,749.90x = 420,709,062,616.40
  5. Step 5: Solve for x
    x = 420,709,062,616.40/725,749.90
  6. Step 6: Final answer
    x = 579,688.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.