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Finding the Fourth Proportional to 389,431.50, 537,415.50 and 210,583.50

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Solution

The fourth proportional to 389,431.50, 537,415.50 and 210,583.50 is: 290,605.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,431.50 : 537,415.50 = 210,583.50 : x
  2. Step 2: Convert to fraction form
    389,431.50/537,415.50 = 210,583.50/x
  3. Step 3: Cross multiply
    389,431.50x = 537,415.50 × 210,583.50
  4. Step 4: Simplify right side
    389,431.50x = 113,170,836,944.25
  5. Step 5: Solve for x
    x = 113,170,836,944.25/389,431.50
  6. Step 6: Final answer
    x = 290,605.25

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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.