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Finding the Fourth Proportional to 382,656.96, 528,058.44 and 221,518.80

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Solution

The fourth proportional to 382,656.96, 528,058.44 and 221,518.80 is: 305,691.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,656.96 : 528,058.44 = 221,518.80 : x
  2. Step 2: Convert to fraction form
    382,656.96/528,058.44 = 221,518.80/x
  3. Step 3: Cross multiply
    382,656.96x = 528,058.44 × 221,518.80
  4. Step 4: Simplify right side
    382,656.96x = 116,974,871,958.67
  5. Step 5: Solve for x
    x = 116,974,871,958.67/382,656.96
  6. Step 6: Final answer
    x = 305,691.22

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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.