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Finding the Fourth Proportional to 378,068.72, 521,810.28 and 217,032.56

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Solution

The fourth proportional to 378,068.72, 521,810.28 and 217,032.56 is: 299,548.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,068.72 : 521,810.28 = 217,032.56 : x
  2. Step 2: Convert to fraction form
    378,068.72/521,810.28 = 217,032.56/x
  3. Step 3: Cross multiply
    378,068.72x = 521,810.28 × 217,032.56
  4. Step 4: Simplify right side
    378,068.72x = 113,249,820,902.72
  5. Step 5: Solve for x
    x = 113,249,820,902.72/378,068.72
  6. Step 6: Final answer
    x = 299,548.24

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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.