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Finding the Fourth Proportional to 418,576.32, 627,993.96 and 145,045.80

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Solution

The fourth proportional to 418,576.32, 627,993.96 and 145,045.80 is: 217,613.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,576.32 : 627,993.96 = 145,045.80 : x
  2. Step 2: Convert to fraction form
    418,576.32/627,993.96 = 145,045.80/x
  3. Step 3: Cross multiply
    418,576.32x = 627,993.96 × 145,045.80
  4. Step 4: Simplify right side
    418,576.32x = 91,087,886,323.37
  5. Step 5: Solve for x
    x = 91,087,886,323.37/418,576.32
  6. Step 6: Final answer
    x = 217,613.57

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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.