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Finding the Fourth Proportional to 388,713.68, 536,426.76 and 218,950.48

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Solution

The fourth proportional to 388,713.68, 536,426.76 and 218,950.48 is: 302,152.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,713.68 : 536,426.76 = 218,950.48 : x
  2. Step 2: Convert to fraction form
    388,713.68/536,426.76 = 218,950.48/x
  3. Step 3: Cross multiply
    388,713.68x = 536,426.76 × 218,950.48
  4. Step 4: Simplify right side
    388,713.68x = 117,450,896,586.85
  5. Step 5: Solve for x
    x = 117,450,896,586.85/388,713.68
  6. Step 6: Final answer
    x = 302,152.72

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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.