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Finding the Fourth Proportional to 391,747.42, 540,611.67 and 212,899.42

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Solution

The fourth proportional to 391,747.42, 540,611.67 and 212,899.42 is: 293,801.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,747.42 : 540,611.67 = 212,899.42 : x
  2. Step 2: Convert to fraction form
    391,747.42/540,611.67 = 212,899.42/x
  3. Step 3: Cross multiply
    391,747.42x = 540,611.67 × 212,899.42
  4. Step 4: Simplify right side
    391,747.42x = 115,095,910,988.23
  5. Step 5: Solve for x
    x = 115,095,910,988.23/391,747.42
  6. Step 6: Final answer
    x = 293,801.32

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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.