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Finding the Fourth Proportional to 539,601.36, 745,251.48 and 420,179.28

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Solution

The fourth proportional to 539,601.36, 745,251.48 and 420,179.28 is: 580,315.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,601.36 : 745,251.48 = 420,179.28 : x
  2. Step 2: Convert to fraction form
    539,601.36/745,251.48 = 420,179.28/x
  3. Step 3: Cross multiply
    539,601.36x = 745,251.48 × 420,179.28
  4. Step 4: Simplify right side
    539,601.36x = 313,139,230,285.33
  5. Step 5: Solve for x
    x = 313,139,230,285.33/539,601.36
  6. Step 6: Final answer
    x = 580,315.87

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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.