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Finding the Fourth Proportional to 285,185.48, 393,136.84 and 217,083.84

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Solution

The fourth proportional to 285,185.48, 393,136.84 and 217,083.84 is: 299,256.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,185.48 : 393,136.84 = 217,083.84 : x
  2. Step 2: Convert to fraction form
    285,185.48/393,136.84 = 217,083.84/x
  3. Step 3: Cross multiply
    285,185.48x = 393,136.84 × 217,083.84
  4. Step 4: Simplify right side
    285,185.48x = 85,343,654,872.67
  5. Step 5: Solve for x
    x = 85,343,654,872.67/285,185.48
  6. Step 6: Final answer
    x = 299,256.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.