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Finding the Fourth Proportional to 547,419.36, 755,409.84 and 308,940

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Solution

The fourth proportional to 547,419.36, 755,409.84 and 308,940 is: 426,320.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,419.36 : 755,409.84 = 308,940 : x
  2. Step 2: Convert to fraction form
    547,419.36/755,409.84 = 308,940/x
  3. Step 3: Cross multiply
    547,419.36x = 755,409.84 × 308,940
  4. Step 4: Simplify right side
    547,419.36x = 233,376,315,969.60
  5. Step 5: Solve for x
    x = 233,376,315,969.60/547,419.36
  6. Step 6: Final answer
    x = 426,320.90

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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.