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Finding the Fourth Proportional to 388,238.59, 535,762.87 and 218,472.71

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Solution

The fourth proportional to 388,238.59, 535,762.87 and 218,472.71 is: 301,488.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,238.59 : 535,762.87 = 218,472.71 : x
  2. Step 2: Convert to fraction form
    388,238.59/535,762.87 = 218,472.71/x
  3. Step 3: Cross multiply
    388,238.59x = 535,762.87 × 218,472.71
  4. Step 4: Simplify right side
    388,238.59x = 117,049,566,126.28
  5. Step 5: Solve for x
    x = 117,049,566,126.28/388,238.59
  6. Step 6: Final answer
    x = 301,488.75

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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.