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Finding the Fourth Proportional to 390,455.70, 538,868.61 and 237,504.43

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Solution

The fourth proportional to 390,455.70, 538,868.61 and 237,504.43 is: 327,780.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,455.70 : 538,868.61 = 237,504.43 : x
  2. Step 2: Convert to fraction form
    390,455.70/538,868.61 = 237,504.43/x
  3. Step 3: Cross multiply
    390,455.70x = 538,868.61 × 237,504.43
  4. Step 4: Simplify right side
    390,455.70x = 127,983,682,062.94
  5. Step 5: Solve for x
    x = 127,983,682,062.94/390,455.70
  6. Step 6: Final answer
    x = 327,780.29

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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.