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Finding the Fourth Proportional to 779,808.71, 1,076,136 and 422,112.71

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Solution

The fourth proportional to 779,808.71, 1,076,136 and 422,112.71 is: 582,515.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    779,808.71 : 1,076,136 = 422,112.71 : x
  2. Step 2: Convert to fraction form
    779,808.71/1,076,136 = 422,112.71/x
  3. Step 3: Cross multiply
    779,808.71x = 1,076,136 × 422,112.71
  4. Step 4: Simplify right side
    779,808.71x = 454,250,683,288.56
  5. Step 5: Solve for x
    x = 454,250,683,288.56/779,808.71
  6. Step 6: Final answer
    x = 582,515.53

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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.