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Finding the Fourth Proportional to 420,843, 580,686.24 and 239,544.36

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Solution

The fourth proportional to 420,843, 580,686.24 and 239,544.36 is: 330,527.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,843 : 580,686.24 = 239,544.36 : x
  2. Step 2: Convert to fraction form
    420,843/580,686.24 = 239,544.36/x
  3. Step 3: Cross multiply
    420,843x = 580,686.24 × 239,544.36
  4. Step 4: Simplify right side
    420,843x = 139,100,113,721.61
  5. Step 5: Solve for x
    x = 139,100,113,721.61/420,843
  6. Step 6: Final answer
    x = 330,527.33

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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.