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Finding the Fourth Proportional to 286,422.30, 429,524.10 and 86,676.30

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Solution

The fourth proportional to 286,422.30, 429,524.10 and 86,676.30 is: 129,981.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,422.30 : 429,524.10 = 86,676.30 : x
  2. Step 2: Convert to fraction form
    286,422.30/429,524.10 = 86,676.30/x
  3. Step 3: Cross multiply
    286,422.30x = 429,524.10 × 86,676.30
  4. Step 4: Simplify right side
    286,422.30x = 37,229,559,748.83
  5. Step 5: Solve for x
    x = 37,229,559,748.83/286,422.30
  6. Step 6: Final answer
    x = 129,981.36

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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.