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Finding the Fourth Proportional to 389,436.75, 537,422.75 and 210,588.75

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Solution

The fourth proportional to 389,436.75, 537,422.75 and 210,588.75 is: 290,612.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,436.75 : 537,422.75 = 210,588.75 : x
  2. Step 2: Convert to fraction form
    389,436.75/537,422.75 = 210,588.75/x
  3. Step 3: Cross multiply
    389,436.75x = 537,422.75 × 210,588.75
  4. Step 4: Simplify right side
    389,436.75x = 113,175,184,091.12
  5. Step 5: Solve for x
    x = 113,175,184,091.12/389,436.75
  6. Step 6: Final answer
    x = 290,612.49

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1.5x scale

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.