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Finding the Fourth Proportional to 388,658.88, 536,351.04 and 218,895.84

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Solution

The fourth proportional to 388,658.88, 536,351.04 and 218,895.84 is: 302,077.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,658.88 : 536,351.04 = 218,895.84 : x
  2. Step 2: Convert to fraction form
    388,658.88/536,351.04 = 218,895.84/x
  3. Step 3: Cross multiply
    388,658.88x = 536,351.04 × 218,895.84
  4. Step 4: Simplify right side
    388,658.88x = 117,405,011,435.67
  5. Step 5: Solve for x
    x = 117,405,011,435.67/388,658.88
  6. Step 6: Final answer
    x = 302,077.26

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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.