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Finding the Fourth Proportional to 368,406.90, 552,587.79 and 216,687.88

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Solution

The fourth proportional to 368,406.90, 552,587.79 and 216,687.88 is: 325,018.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,406.90 : 552,587.79 = 216,687.88 : x
  2. Step 2: Convert to fraction form
    368,406.90/552,587.79 = 216,687.88/x
  3. Step 3: Cross multiply
    368,406.90x = 552,587.79 × 216,687.88
  4. Step 4: Simplify right side
    368,406.90x = 119,739,076,728.99
  5. Step 5: Solve for x
    x = 119,739,076,728.99/368,406.90
  6. Step 6: Final answer
    x = 325,018.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.