Home / 287,748.70-431,623.05-188,215.90

Finding the Fourth Proportional to 287,748.70, 431,623.05 and 188,215.90

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Solution

The fourth proportional to 287,748.70, 431,623.05 and 188,215.90 is: 282,323.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,748.70 : 431,623.05 = 188,215.90 : x
  2. Step 2: Convert to fraction form
    287,748.70/431,623.05 = 188,215.90/x
  3. Step 3: Cross multiply
    287,748.70x = 431,623.05 × 188,215.90
  4. Step 4: Simplify right side
    287,748.70x = 81,238,320,816.50
  5. Step 5: Solve for x
    x = 81,238,320,816.50/287,748.70
  6. Step 6: Final answer
    x = 282,323.85

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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.