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Finding the Fourth Proportional to 376,871.31, 520,038.78 and 215,716.77

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Solution

The fourth proportional to 376,871.31, 520,038.78 and 215,716.77 is: 297,664.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,871.31 : 520,038.78 = 215,716.77 : x
  2. Step 2: Convert to fraction form
    376,871.31/520,038.78 = 215,716.77/x
  3. Step 3: Cross multiply
    376,871.31x = 520,038.78 × 215,716.77
  4. Step 4: Simplify right side
    376,871.31x = 112,181,085,896.34
  5. Step 5: Solve for x
    x = 112,181,085,896.34/376,871.31
  6. Step 6: Final answer
    x = 297,664.17

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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.