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Finding the Fourth Proportional to 388,715.68, 536,429.52 and 218,952.48

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Solution

The fourth proportional to 388,715.68, 536,429.52 and 218,952.48 is: 302,155.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,715.68 : 536,429.52 = 218,952.48 : x
  2. Step 2: Convert to fraction form
    388,715.68/536,429.52 = 218,952.48/x
  3. Step 3: Cross multiply
    388,715.68x = 536,429.52 × 218,952.48
  4. Step 4: Simplify right side
    388,715.68x = 117,452,573,749.21
  5. Step 5: Solve for x
    x = 117,452,573,749.21/388,715.68
  6. Step 6: Final answer
    x = 302,155.48

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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.