Home / 388,719.69-536,412.47-218,942.88

Finding the Fourth Proportional to 388,719.69, 536,412.47 and 218,942.88

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Solution

The fourth proportional to 388,719.69, 536,412.47 and 218,942.88 is: 302,129.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,719.69 : 536,412.47 = 218,942.88 : x
  2. Step 2: Convert to fraction form
    388,719.69/536,412.47 = 218,942.88/x
  3. Step 3: Cross multiply
    388,719.69x = 536,412.47 × 218,942.88
  4. Step 4: Simplify right side
    388,719.69x = 117,443,691,049.71
  5. Step 5: Solve for x
    x = 117,443,691,049.71/388,719.69
  6. Step 6: Final answer
    x = 302,129.51

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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.