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Finding the Fourth Proportional to 286,721.80, 429,693.90 and 191,681.80

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Solution

The fourth proportional to 286,721.80, 429,693.90 and 191,681.80 is: 287,262.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,721.80 : 429,693.90 = 191,681.80 : x
  2. Step 2: Convert to fraction form
    286,721.80/429,693.90 = 191,681.80/x
  3. Step 3: Cross multiply
    286,721.80x = 429,693.90 × 191,681.80
  4. Step 4: Simplify right side
    286,721.80x = 82,364,500,201.02
  5. Step 5: Solve for x
    x = 82,364,500,201.02/286,721.80
  6. Step 6: Final answer
    x = 287,262.78

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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.