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Finding the Fourth Proportional to 385,406.40, 577,850.40 and 205,521.60

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Solution

The fourth proportional to 385,406.40, 577,850.40 and 205,521.60 is: 308,144.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,406.40 : 577,850.40 = 205,521.60 : x
  2. Step 2: Convert to fraction form
    385,406.40/577,850.40 = 205,521.60/x
  3. Step 3: Cross multiply
    385,406.40x = 577,850.40 × 205,521.60
  4. Step 4: Simplify right side
    385,406.40x = 118,760,738,768.64
  5. Step 5: Solve for x
    x = 118,760,738,768.64/385,406.40
  6. Step 6: Final answer
    x = 308,144.18

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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.