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Finding the Fourth Proportional to 389,818.63, 537,949.65 and 210,970.63

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Solution

The fourth proportional to 389,818.63, 537,949.65 and 210,970.63 is: 291,139.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,818.63 : 537,949.65 = 210,970.63 : x
  2. Step 2: Convert to fraction form
    389,818.63/537,949.65 = 210,970.63/x
  3. Step 3: Cross multiply
    389,818.63x = 537,949.65 × 210,970.63
  4. Step 4: Simplify right side
    389,818.63x = 113,491,576,568.78
  5. Step 5: Solve for x
    x = 113,491,576,568.78/389,818.63
  6. Step 6: Final answer
    x = 291,139.44

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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.