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Finding the Fourth Proportional to 385,628.65, 532,153.80 and 213,536.45

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Solution

The fourth proportional to 385,628.65, 532,153.80 and 213,536.45 is: 294,672.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,628.65 : 532,153.80 = 213,536.45 : x
  2. Step 2: Convert to fraction form
    385,628.65/532,153.80 = 213,536.45/x
  3. Step 3: Cross multiply
    385,628.65x = 532,153.80 × 213,536.45
  4. Step 4: Simplify right side
    385,628.65x = 113,634,234,636.40
  5. Step 5: Solve for x
    x = 113,634,234,636.40/385,628.65
  6. Step 6: Final answer
    x = 294,672.70

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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.