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Finding the Fourth Proportional to 547,382.89, 755,173.87 and 317,900.95

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Solution

The fourth proportional to 547,382.89, 755,173.87 and 317,900.95 is: 438,578.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,382.89 : 755,173.87 = 317,900.95 : x
  2. Step 2: Convert to fraction form
    547,382.89/755,173.87 = 317,900.95/x
  3. Step 3: Cross multiply
    547,382.89x = 755,173.87 × 317,900.95
  4. Step 4: Simplify right side
    547,382.89x = 240,070,490,688.18
  5. Step 5: Solve for x
    x = 240,070,490,688.18/547,382.89
  6. Step 6: Final answer
    x = 438,578.73

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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.