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Finding the Fourth Proportional to 317,400.88, 437,813.76 and 221,872.72

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Solution

The fourth proportional to 317,400.88, 437,813.76 and 221,872.72 is: 306,044.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,400.88 : 437,813.76 = 221,872.72 : x
  2. Step 2: Convert to fraction form
    317,400.88/437,813.76 = 221,872.72/x
  3. Step 3: Cross multiply
    317,400.88x = 437,813.76 × 221,872.72
  4. Step 4: Simplify right side
    317,400.88x = 97,138,929,784.63
  5. Step 5: Solve for x
    x = 97,138,929,784.63/317,400.88
  6. Step 6: Final answer
    x = 306,044.93

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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.