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Finding the Fourth Proportional to 389,475.75, 537,476.55 and 210,627.75

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Solution

The fourth proportional to 389,475.75, 537,476.55 and 210,627.75 is: 290,666.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,475.75 : 537,476.55 = 210,627.75 : x
  2. Step 2: Convert to fraction form
    389,475.75/537,476.55 = 210,627.75/x
  3. Step 3: Cross multiply
    389,475.75x = 537,476.55 × 210,627.75
  4. Step 4: Simplify right side
    389,475.75x = 113,207,476,404.26
  5. Step 5: Solve for x
    x = 113,207,476,404.26/389,475.75
  6. Step 6: Final answer
    x = 290,666.30

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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.