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Finding the Fourth Proportional to 383,388.84, 528,731.28 and 240,161.40

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Solution

The fourth proportional to 383,388.84, 528,731.28 and 240,161.40 is: 331,206.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,388.84 : 528,731.28 = 240,161.40 : x
  2. Step 2: Convert to fraction form
    383,388.84/528,731.28 = 240,161.40/x
  3. Step 3: Cross multiply
    383,388.84x = 528,731.28 × 240,161.40
  4. Step 4: Simplify right side
    383,388.84x = 126,980,844,428.59
  5. Step 5: Solve for x
    x = 126,980,844,428.59/383,388.84
  6. Step 6: Final answer
    x = 331,206.42

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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.