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Finding the Fourth Proportional to 385,029.72, 531,127.70 and 223,866.95

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Solution

The fourth proportional to 385,029.72, 531,127.70 and 223,866.95 is: 308,812.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,029.72 : 531,127.70 = 223,866.95 : x
  2. Step 2: Convert to fraction form
    385,029.72/531,127.70 = 223,866.95/x
  3. Step 3: Cross multiply
    385,029.72x = 531,127.70 × 223,866.95
  4. Step 4: Simplify right side
    385,029.72x = 118,901,938,468.00
  5. Step 5: Solve for x
    x = 118,901,938,468.00/385,029.72
  6. Step 6: Final answer
    x = 308,812.37

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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.