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Finding the Fourth Proportional to 296,781.52, 445,173 and 86,424.56

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Solution

The fourth proportional to 296,781.52, 445,173 and 86,424.56 is: 129,637.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,781.52 : 445,173 = 86,424.56 : x
  2. Step 2: Convert to fraction form
    296,781.52/445,173 = 86,424.56/x
  3. Step 3: Cross multiply
    296,781.52x = 445,173 × 86,424.56
  4. Step 4: Simplify right side
    296,781.52x = 38,473,880,648.88
  5. Step 5: Solve for x
    x = 38,473,880,648.88/296,781.52
  6. Step 6: Final answer
    x = 129,637.05

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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.