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Finding the Fourth Proportional to 385,992.60, 532,669.68 and 211,561.80

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Solution

The fourth proportional to 385,992.60, 532,669.68 and 211,561.80 is: 291,955.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,992.60 : 532,669.68 = 211,561.80 : x
  2. Step 2: Convert to fraction form
    385,992.60/532,669.68 = 211,561.80/x
  3. Step 3: Cross multiply
    385,992.60x = 532,669.68 × 211,561.80
  4. Step 4: Simplify right side
    385,992.60x = 112,692,556,306.22
  5. Step 5: Solve for x
    x = 112,692,556,306.22/385,992.60
  6. Step 6: Final answer
    x = 291,955.22

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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.