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Finding the Fourth Proportional to 388,242.39, 535,770.23 and 216,156.59

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Solution

The fourth proportional to 388,242.39, 535,770.23 and 216,156.59 is: 298,293.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,242.39 : 535,770.23 = 216,156.59 : x
  2. Step 2: Convert to fraction form
    388,242.39/535,770.23 = 216,156.59/x
  3. Step 3: Cross multiply
    388,242.39x = 535,770.23 × 216,156.59
  4. Step 4: Simplify right side
    388,242.39x = 115,810,265,564.19
  5. Step 5: Solve for x
    x = 115,810,265,564.19/388,242.39
  6. Step 6: Final answer
    x = 298,293.72

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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.