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Finding the Fourth Proportional to 254,951.55, 382,463.78 and 86,479.65

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Solution

The fourth proportional to 254,951.55, 382,463.78 and 86,479.65 is: 129,731.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,951.55 : 382,463.78 = 86,479.65 : x
  2. Step 2: Convert to fraction form
    254,951.55/382,463.78 = 86,479.65/x
  3. Step 3: Cross multiply
    254,951.55x = 382,463.78 × 86,479.65
  4. Step 4: Simplify right side
    254,951.55x = 33,075,333,399.68
  5. Step 5: Solve for x
    x = 33,075,333,399.68/254,951.55
  6. Step 6: Final answer
    x = 129,731.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.