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Finding the Fourth Proportional to 389,361.52, 537,319.70 and 210,513.52

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Solution

The fourth proportional to 389,361.52, 537,319.70 and 210,513.52 is: 290,509.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,361.52 : 537,319.70 = 210,513.52 : x
  2. Step 2: Convert to fraction form
    389,361.52/537,319.70 = 210,513.52/x
  3. Step 3: Cross multiply
    389,361.52x = 537,319.70 × 210,513.52
  4. Step 4: Simplify right side
    389,361.52x = 113,113,061,412.34
  5. Step 5: Solve for x
    x = 113,113,061,412.34/389,361.52
  6. Step 6: Final answer
    x = 290,509.09

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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.