Home / 492,905.40-739,358.10-212,422.65

Finding the Fourth Proportional to 492,905.40, 739,358.10 and 212,422.65

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Solution

The fourth proportional to 492,905.40, 739,358.10 and 212,422.65 is: 318,633.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,905.40 : 739,358.10 = 212,422.65 : x
  2. Step 2: Convert to fraction form
    492,905.40/739,358.10 = 212,422.65/x
  3. Step 3: Cross multiply
    492,905.40x = 739,358.10 × 212,422.65
  4. Step 4: Simplify right side
    492,905.40x = 157,056,406,900.97
  5. Step 5: Solve for x
    x = 157,056,406,900.97/492,905.40
  6. Step 6: Final answer
    x = 318,633.98

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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.