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Finding the Fourth Proportional to 385,422.94, 531,532.23 and 330,957.98

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Solution

The fourth proportional to 385,422.94, 531,532.23 and 330,957.98 is: 456,420.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,422.94 : 531,532.23 = 330,957.98 : x
  2. Step 2: Convert to fraction form
    385,422.94/531,532.23 = 330,957.98/x
  3. Step 3: Cross multiply
    385,422.94x = 531,532.23 × 330,957.98
  4. Step 4: Simplify right side
    385,422.94x = 175,914,834,230.06
  5. Step 5: Solve for x
    x = 175,914,834,230.06/385,422.94
  6. Step 6: Final answer
    x = 456,420.25

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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.