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Finding the Fourth Proportional to 385,679.94, 578,893.07 and 186,140.81

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Solution

The fourth proportional to 385,679.94, 578,893.07 and 186,140.81 is: 279,391.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,679.94 : 578,893.07 = 186,140.81 : x
  2. Step 2: Convert to fraction form
    385,679.94/578,893.07 = 186,140.81/x
  3. Step 3: Cross multiply
    385,679.94x = 578,893.07 × 186,140.81
  4. Step 4: Simplify right side
    385,679.94x = 107,755,621,128.02
  5. Step 5: Solve for x
    x = 107,755,621,128.02/385,679.94
  6. Step 6: Final answer
    x = 279,391.30

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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.