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Finding the Fourth Proportional to 388,463.28, 536,130.44 and 218,730.48

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Solution

The fourth proportional to 388,463.28, 536,130.44 and 218,730.48 is: 301,876.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,463.28 : 536,130.44 = 218,730.48 : x
  2. Step 2: Convert to fraction form
    388,463.28/536,130.44 = 218,730.48/x
  3. Step 3: Cross multiply
    388,463.28x = 536,130.44 × 218,730.48
  4. Step 4: Simplify right side
    388,463.28x = 117,268,068,483.81
  5. Step 5: Solve for x
    x = 117,268,068,483.81/388,463.28
  6. Step 6: Final answer
    x = 301,876.84

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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.