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Finding the Fourth Proportional to 389,124.50, 536,991.81 and 210,276.50

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Solution

The fourth proportional to 389,124.50, 536,991.81 and 210,276.50 is: 290,181.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,124.50 : 536,991.81 = 210,276.50 : x
  2. Step 2: Convert to fraction form
    389,124.50/536,991.81 = 210,276.50/x
  3. Step 3: Cross multiply
    389,124.50x = 536,991.81 × 210,276.50
  4. Step 4: Simplify right side
    389,124.50x = 112,916,758,335.47
  5. Step 5: Solve for x
    x = 112,916,758,335.47/389,124.50
  6. Step 6: Final answer
    x = 290,181.57

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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.