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Finding the Fourth Proportional to 382,905.79, 528,401.23 and 239,744.77

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Solution

The fourth proportional to 382,905.79, 528,401.23 and 239,744.77 is: 330,842.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,905.79 : 528,401.23 = 239,744.77 : x
  2. Step 2: Convert to fraction form
    382,905.79/528,401.23 = 239,744.77/x
  3. Step 3: Cross multiply
    382,905.79x = 528,401.23 × 239,744.77
  4. Step 4: Simplify right side
    382,905.79x = 126,681,429,433.70
  5. Step 5: Solve for x
    x = 126,681,429,433.70/382,905.79
  6. Step 6: Final answer
    x = 330,842.29

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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.