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Finding the Fourth Proportional to 528,578.66, 729,428.18 and 299,131.68

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Solution

The fourth proportional to 528,578.66, 729,428.18 and 299,131.68 is: 412,795.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,578.66 : 729,428.18 = 299,131.68 : x
  2. Step 2: Convert to fraction form
    528,578.66/729,428.18 = 299,131.68/x
  3. Step 3: Cross multiply
    528,578.66x = 729,428.18 × 299,131.68
  4. Step 4: Simplify right side
    528,578.66x = 218,195,076,922.74
  5. Step 5: Solve for x
    x = 218,195,076,922.74/528,578.66
  6. Step 6: Final answer
    x = 412,795.85

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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.