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Finding the Fourth Proportional to 389,818.54, 537,949.65 and 210,970.54

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Solution

The fourth proportional to 389,818.54, 537,949.65 and 210,970.54 is: 291,139.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,818.54 : 537,949.65 = 210,970.54 : x
  2. Step 2: Convert to fraction form
    389,818.54/537,949.65 = 210,970.54/x
  3. Step 3: Cross multiply
    389,818.54x = 537,949.65 × 210,970.54
  4. Step 4: Simplify right side
    389,818.54x = 113,491,528,153.31
  5. Step 5: Solve for x
    x = 113,491,528,153.31/389,818.54
  6. Step 6: Final answer
    x = 291,139.38

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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.