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Finding the Fourth Proportional to 389,804.57, 537,930.33 and 210,956.57

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Solution

The fourth proportional to 389,804.57, 537,930.33 and 210,956.57 is: 291,120.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,804.57 : 537,930.33 = 210,956.57 : x
  2. Step 2: Convert to fraction form
    389,804.57/537,930.33 = 210,956.57/x
  3. Step 3: Cross multiply
    389,804.57x = 537,930.33 × 210,956.57
  4. Step 4: Simplify right side
    389,804.57x = 113,479,934,626.12
  5. Step 5: Solve for x
    x = 113,479,934,626.12/389,804.57
  6. Step 6: Final answer
    x = 291,120.08

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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.