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Finding the Fourth Proportional to 285,531.88, 428,263.80 and 75,186.22

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Solution

The fourth proportional to 285,531.88, 428,263.80 and 75,186.22 is: 112,770.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,531.88 : 428,263.80 = 75,186.22 : x
  2. Step 2: Convert to fraction form
    285,531.88/428,263.80 = 75,186.22/x
  3. Step 3: Cross multiply
    285,531.88x = 428,263.80 × 75,186.22
  4. Step 4: Simplify right side
    285,531.88x = 32,199,536,284.84
  5. Step 5: Solve for x
    x = 32,199,536,284.84/285,531.88
  6. Step 6: Final answer
    x = 112,770.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.