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Finding the Fourth Proportional to 388,840.32, 536,561.28 and 219,104.64

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Solution

The fourth proportional to 388,840.32, 536,561.28 and 219,104.64 is: 302,342.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,840.32 : 536,561.28 = 219,104.64 : x
  2. Step 2: Convert to fraction form
    388,840.32/536,561.28 = 219,104.64/x
  3. Step 3: Cross multiply
    388,840.32x = 536,561.28 × 219,104.64
  4. Step 4: Simplify right side
    388,840.32x = 117,563,066,092.34
  5. Step 5: Solve for x
    x = 117,563,066,092.34/388,840.32
  6. Step 6: Final answer
    x = 302,342.79

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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.