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Finding the Fourth Proportional to 382,900.87, 528,393.94 and 239,739.85

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Solution

The fourth proportional to 382,900.87, 528,393.94 and 239,739.85 is: 330,835.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,900.87 : 528,393.94 = 239,739.85 : x
  2. Step 2: Convert to fraction form
    382,900.87/528,393.94 = 239,739.85/x
  3. Step 3: Cross multiply
    382,900.87x = 528,393.94 × 239,739.85
  4. Step 4: Simplify right side
    382,900.87x = 126,677,083,916.51
  5. Step 5: Solve for x
    x = 126,677,083,916.51/382,900.87
  6. Step 6: Final answer
    x = 330,835.19

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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.