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Finding the Fourth Proportional to 388,767.09, 536,496.20 and 219,055.89

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Solution

The fourth proportional to 388,767.09, 536,496.20 and 219,055.89 is: 302,295.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,767.09 : 536,496.20 = 219,055.89 : x
  2. Step 2: Convert to fraction form
    388,767.09/536,496.20 = 219,055.89/x
  3. Step 3: Cross multiply
    388,767.09x = 536,496.20 × 219,055.89
  4. Step 4: Simplify right side
    388,767.09x = 117,522,651,477.34
  5. Step 5: Solve for x
    x = 117,522,651,477.34/388,767.09
  6. Step 6: Final answer
    x = 302,295.78

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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.