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Finding the Fourth Proportional to 317,138.40, 437,649.84 and 173,894.76

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Solution

The fourth proportional to 317,138.40, 437,649.84 and 173,894.76 is: 239,974.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,138.40 : 437,649.84 = 173,894.76 : x
  2. Step 2: Convert to fraction form
    317,138.40/437,649.84 = 173,894.76/x
  3. Step 3: Cross multiply
    317,138.40x = 437,649.84 × 173,894.76
  4. Step 4: Simplify right side
    317,138.40x = 76,105,013,890.84
  5. Step 5: Solve for x
    x = 76,105,013,890.84/317,138.40
  6. Step 6: Final answer
    x = 239,974.14

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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.