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Finding the Fourth Proportional to 385,716.90, 532,283.49 and 215,957.10

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Solution

The fourth proportional to 385,716.90, 532,283.49 and 215,957.10 is: 298,017.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,716.90 : 532,283.49 = 215,957.10 : x
  2. Step 2: Convert to fraction form
    385,716.90/532,283.49 = 215,957.10/x
  3. Step 3: Cross multiply
    385,716.90x = 532,283.49 × 215,957.10
  4. Step 4: Simplify right side
    385,716.90x = 114,950,398,878.28
  5. Step 5: Solve for x
    x = 114,950,398,878.28/385,716.90
  6. Step 6: Final answer
    x = 298,017.53

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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.