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Finding the Fourth Proportional to 388,765.43, 536,501.66 and 216,678.59

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Solution

The fourth proportional to 388,765.43, 536,501.66 and 216,678.59 is: 299,019.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,765.43 : 536,501.66 = 216,678.59 : x
  2. Step 2: Convert to fraction form
    388,765.43/536,501.66 = 216,678.59/x
  3. Step 3: Cross multiply
    388,765.43x = 536,501.66 × 216,678.59
  4. Step 4: Simplify right side
    388,765.43x = 116,248,419,455.56
  5. Step 5: Solve for x
    x = 116,248,419,455.56/388,765.43
  6. Step 6: Final answer
    x = 299,019.44

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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.