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Finding the Fourth Proportional to 388,301.81, 536,021.82 and 261,051.21

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Solution

The fourth proportional to 388,301.81, 536,021.82 and 261,051.21 is: 360,361.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,301.81 : 536,021.82 = 261,051.21 : x
  2. Step 2: Convert to fraction form
    388,301.81/536,021.82 = 261,051.21/x
  3. Step 3: Cross multiply
    388,301.81x = 536,021.82 × 261,051.21
  4. Step 4: Simplify right side
    388,301.81x = 139,929,144,697.40
  5. Step 5: Solve for x
    x = 139,929,144,697.40/388,301.81
  6. Step 6: Final answer
    x = 360,361.82

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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.