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Finding the Fourth Proportional to 388,347.69, 535,885.70 and 216,252.66

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Solution

The fourth proportional to 388,347.69, 535,885.70 and 216,252.66 is: 298,409.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,347.69 : 535,885.70 = 216,252.66 : x
  2. Step 2: Convert to fraction form
    388,347.69/535,885.70 = 216,252.66/x
  3. Step 3: Cross multiply
    388,347.69x = 535,885.70 × 216,252.66
  4. Step 4: Simplify right side
    388,347.69x = 115,886,706,999.70
  5. Step 5: Solve for x
    x = 115,886,706,999.70/388,347.69
  6. Step 6: Final answer
    x = 298,409.67

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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.