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Finding the Fourth Proportional to 382,989.34, 528,618.38 and 221,818.38

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Solution

The fourth proportional to 382,989.34, 528,618.38 and 221,818.38 is: 306,163.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,989.34 : 528,618.38 = 221,818.38 : x
  2. Step 2: Convert to fraction form
    382,989.34/528,618.38 = 221,818.38/x
  3. Step 3: Cross multiply
    382,989.34x = 528,618.38 × 221,818.38
  4. Step 4: Simplify right side
    382,989.34x = 117,257,272,689.82
  5. Step 5: Solve for x
    x = 117,257,272,689.82/382,989.34
  6. Step 6: Final answer
    x = 306,163.28

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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.