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Finding the Fourth Proportional to 389,707.61, 537,791.20 and 217,628.37

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Solution

The fourth proportional to 389,707.61, 537,791.20 and 217,628.37 is: 300,324.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,707.61 : 537,791.20 = 217,628.37 : x
  2. Step 2: Convert to fraction form
    389,707.61/537,791.20 = 217,628.37/x
  3. Step 3: Cross multiply
    389,707.61x = 537,791.20 × 217,628.37
  4. Step 4: Simplify right side
    389,707.61x = 117,038,621,712.27
  5. Step 5: Solve for x
    x = 117,038,621,712.27/389,707.61
  6. Step 6: Final answer
    x = 300,324.19

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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.