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Finding the Fourth Proportional to 388,969.06, 536,776.50 and 210,121.06

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Solution

The fourth proportional to 388,969.06, 536,776.50 and 210,121.06 is: 289,966.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,969.06 : 536,776.50 = 210,121.06 : x
  2. Step 2: Convert to fraction form
    388,969.06/536,776.50 = 210,121.06/x
  3. Step 3: Cross multiply
    388,969.06x = 536,776.50 × 210,121.06
  4. Step 4: Simplify right side
    388,969.06x = 112,788,047,163.09
  5. Step 5: Solve for x
    x = 112,788,047,163.09/388,969.06
  6. Step 6: Final answer
    x = 289,966.63

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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.