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Finding the Fourth Proportional to 286,604.43, 429,907.68 and 86,926.55

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Solution

The fourth proportional to 286,604.43, 429,907.68 and 86,926.55 is: 130,390.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,604.43 : 429,907.68 = 86,926.55 : x
  2. Step 2: Convert to fraction form
    286,604.43/429,907.68 = 86,926.55/x
  3. Step 3: Cross multiply
    286,604.43x = 429,907.68 × 86,926.55
  4. Step 4: Simplify right side
    286,604.43x = 37,370,389,291.37
  5. Step 5: Solve for x
    x = 37,370,389,291.37/286,604.43
  6. Step 6: Final answer
    x = 130,390.13

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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.