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Finding the Fourth Proportional to 385,029.78, 531,127.79 and 223,867.01

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Solution

The fourth proportional to 385,029.78, 531,127.79 and 223,867.01 is: 308,812.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,029.78 : 531,127.79 = 223,867.01 : x
  2. Step 2: Convert to fraction form
    385,029.78/531,127.79 = 223,867.01/x
  3. Step 3: Cross multiply
    385,029.78x = 531,127.79 × 223,867.01
  4. Step 4: Simplify right side
    385,029.78x = 118,901,990,275.21
  5. Step 5: Solve for x
    x = 118,901,990,275.21/385,029.78
  6. Step 6: Final answer
    x = 308,812.45

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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.