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Finding the Fourth Proportional to 389,322.56, 537,264 and 219,555.44

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Solution

The fourth proportional to 389,322.56, 537,264 and 219,555.44 is: 302,985.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,322.56 : 537,264 = 219,555.44 : x
  2. Step 2: Convert to fraction form
    389,322.56/537,264 = 219,555.44/x
  3. Step 3: Cross multiply
    389,322.56x = 537,264 × 219,555.44
  4. Step 4: Simplify right side
    389,322.56x = 117,959,233,916.16
  5. Step 5: Solve for x
    x = 117,959,233,916.16/389,322.56
  6. Step 6: Final answer
    x = 302,985.87

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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.