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Finding the Fourth Proportional to 763,679.78, 1,053,862.89 and 424,136.42

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Solution

The fourth proportional to 763,679.78, 1,053,862.89 and 424,136.42 is: 585,299.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,679.78 : 1,053,862.89 = 424,136.42 : x
  2. Step 2: Convert to fraction form
    763,679.78/1,053,862.89 = 424,136.42/x
  3. Step 3: Cross multiply
    763,679.78x = 1,053,862.89 × 424,136.42
  4. Step 4: Simplify right side
    763,679.78x = 446,981,633,335.45
  5. Step 5: Solve for x
    x = 446,981,633,335.45/763,679.78
  6. Step 6: Final answer
    x = 585,299.81

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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.