Home / 287,631.45-431,611.20-198,948.60

Finding the Fourth Proportional to 287,631.45, 431,611.20 and 198,948.60

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Solution

The fourth proportional to 287,631.45, 431,611.20 and 198,948.60 is: 298,536.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,631.45 : 431,611.20 = 198,948.60 : x
  2. Step 2: Convert to fraction form
    287,631.45/431,611.20 = 198,948.60/x
  3. Step 3: Cross multiply
    287,631.45x = 431,611.20 × 198,948.60
  4. Step 4: Simplify right side
    287,631.45x = 85,868,443,984.32
  5. Step 5: Solve for x
    x = 85,868,443,984.32/287,631.45
  6. Step 6: Final answer
    x = 298,536.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.