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Finding the Fourth Proportional to 376,689.60, 519,921.32 and 215,637.75

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Solution

The fourth proportional to 376,689.60, 519,921.32 and 215,637.75 is: 297,631.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,689.60 : 519,921.32 = 215,637.75 : x
  2. Step 2: Convert to fraction form
    376,689.60/519,921.32 = 215,637.75/x
  3. Step 3: Cross multiply
    376,689.60x = 519,921.32 × 215,637.75
  4. Step 4: Simplify right side
    376,689.60x = 112,114,662,543.64
  5. Step 5: Solve for x
    x = 112,114,662,543.64/376,689.60
  6. Step 6: Final answer
    x = 297,631.43

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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.