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Finding the Fourth Proportional to 286,605.61, 429,907.90 and 76,243.56

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Solution

The fourth proportional to 286,605.61, 429,907.90 and 76,243.56 is: 114,365.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,605.61 : 429,907.90 = 76,243.56 : x
  2. Step 2: Convert to fraction form
    286,605.61/429,907.90 = 76,243.56/x
  3. Step 3: Cross multiply
    286,605.61x = 429,907.90 × 76,243.56
  4. Step 4: Simplify right side
    286,605.61x = 32,777,708,768.12
  5. Step 5: Solve for x
    x = 32,777,708,768.12/286,605.61
  6. Step 6: Final answer
    x = 114,365.20

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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.