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Finding the Fourth Proportional to 286,636.21, 429,964.03 and 76,274.35

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Solution

The fourth proportional to 286,636.21, 429,964.03 and 76,274.35 is: 114,414.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,636.21 : 429,964.03 = 76,274.35 : x
  2. Step 2: Convert to fraction form
    286,636.21/429,964.03 = 76,274.35/x
  3. Step 3: Cross multiply
    286,636.21x = 429,964.03 × 76,274.35
  4. Step 4: Simplify right side
    286,636.21x = 32,795,226,911.63
  5. Step 5: Solve for x
    x = 32,795,226,911.63/286,636.21
  6. Step 6: Final answer
    x = 114,414.11

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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.