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Finding the Fourth Proportional to 388,886.82, 536,719.41 and 219,136.74

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Solution

The fourth proportional to 388,886.82, 536,719.41 and 219,136.74 is: 302,440.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,886.82 : 536,719.41 = 219,136.74 : x
  2. Step 2: Convert to fraction form
    388,886.82/536,719.41 = 219,136.74/x
  3. Step 3: Cross multiply
    388,886.82x = 536,719.41 × 219,136.74
  4. Step 4: Simplify right side
    388,886.82x = 117,614,941,802.12
  5. Step 5: Solve for x
    x = 117,614,941,802.12/388,886.82
  6. Step 6: Final answer
    x = 302,440.03

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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.