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Finding the Fourth Proportional to 317,399.88, 437,812.38 and 221,871.72

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Solution

The fourth proportional to 317,399.88, 437,812.38 and 221,871.72 is: 306,043.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,399.88 : 437,812.38 = 221,871.72 : x
  2. Step 2: Convert to fraction form
    317,399.88/437,812.38 = 221,871.72/x
  3. Step 3: Cross multiply
    317,399.88x = 437,812.38 × 221,871.72
  4. Step 4: Simplify right side
    317,399.88x = 97,138,185,787.89
  5. Step 5: Solve for x
    x = 97,138,185,787.89/317,399.88
  6. Step 6: Final answer
    x = 306,043.55

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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.