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Finding the Fourth Proportional to 388,714.68, 536,428.14 and 218,951.48

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Solution

The fourth proportional to 388,714.68, 536,428.14 and 218,951.48 is: 302,154.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,714.68 : 536,428.14 = 218,951.48 : x
  2. Step 2: Convert to fraction form
    388,714.68/536,428.14 = 218,951.48/x
  3. Step 3: Cross multiply
    388,714.68x = 536,428.14 × 218,951.48
  4. Step 4: Simplify right side
    388,714.68x = 117,451,735,166.65
  5. Step 5: Solve for x
    x = 117,451,735,166.65/388,714.68
  6. Step 6: Final answer
    x = 302,154.10

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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.