Home / 312,822.20-469,233.30-212,438.90

Finding the Fourth Proportional to 312,822.20, 469,233.30 and 212,438.90

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Solution

The fourth proportional to 312,822.20, 469,233.30 and 212,438.90 is: 318,658.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,822.20 : 469,233.30 = 212,438.90 : x
  2. Step 2: Convert to fraction form
    312,822.20/469,233.30 = 212,438.90/x
  3. Step 3: Cross multiply
    312,822.20x = 469,233.30 × 212,438.90
  4. Step 4: Simplify right side
    312,822.20x = 99,683,406,095.37
  5. Step 5: Solve for x
    x = 99,683,406,095.37/312,822.20
  6. Step 6: Final answer
    x = 318,658.35

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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.