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Finding the Fourth Proportional to 388,758.81, 536,489.65 and 216,687.70

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Solution

The fourth proportional to 388,758.81, 536,489.65 and 216,687.70 is: 299,030.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,758.81 : 536,489.65 = 216,687.70 : x
  2. Step 2: Convert to fraction form
    388,758.81/536,489.65 = 216,687.70/x
  3. Step 3: Cross multiply
    388,758.81x = 536,489.65 × 216,687.70
  4. Step 4: Simplify right side
    388,758.81x = 116,250,709,144.88
  5. Step 5: Solve for x
    x = 116,250,709,144.88/388,758.81
  6. Step 6: Final answer
    x = 299,030.42

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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.