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Finding the Fourth Proportional to 388,351.08, 536,090.31 and 261,100.50

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Solution

The fourth proportional to 388,351.08, 536,090.31 and 261,100.50 is: 360,430.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,351.08 : 536,090.31 = 261,100.50 : x
  2. Step 2: Convert to fraction form
    388,351.08/536,090.31 = 261,100.50/x
  3. Step 3: Cross multiply
    388,351.08x = 536,090.31 × 261,100.50
  4. Step 4: Simplify right side
    388,351.08x = 139,973,447,986.16
  5. Step 5: Solve for x
    x = 139,973,447,986.16/388,351.08
  6. Step 6: Final answer
    x = 360,430.18

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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.