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Finding the Fourth Proportional to 385,099.80, 531,396.82 and 212,990.42

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Solution

The fourth proportional to 385,099.80, 531,396.82 and 212,990.42 is: 293,904.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,099.80 : 531,396.82 = 212,990.42 : x
  2. Step 2: Convert to fraction form
    385,099.80/531,396.82 = 212,990.42/x
  3. Step 3: Cross multiply
    385,099.80x = 531,396.82 × 212,990.42
  4. Step 4: Simplify right side
    385,099.80x = 113,182,429,221.48
  5. Step 5: Solve for x
    x = 113,182,429,221.48/385,099.80
  6. Step 6: Final answer
    x = 293,904.15

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1.5x scale

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.