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Finding the Fourth Proportional to 399,309.69, 550,848.51 and 238,051.11

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Solution

The fourth proportional to 399,309.69, 550,848.51 and 238,051.11 is: 328,391.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,309.69 : 550,848.51 = 238,051.11 : x
  2. Step 2: Convert to fraction form
    399,309.69/550,848.51 = 238,051.11/x
  3. Step 3: Cross multiply
    399,309.69x = 550,848.51 × 238,051.11
  4. Step 4: Simplify right side
    399,309.69x = 131,130,099,247.35
  5. Step 5: Solve for x
    x = 131,130,099,247.35/399,309.69
  6. Step 6: Final answer
    x = 328,391.98

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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.