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Finding the Fourth Proportional to 658,488.40, 988,193.40 and 422,405.20

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Solution

The fourth proportional to 658,488.40, 988,193.40 and 422,405.20 is: 633,903.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,488.40 : 988,193.40 = 422,405.20 : x
  2. Step 2: Convert to fraction form
    658,488.40/988,193.40 = 422,405.20/x
  3. Step 3: Cross multiply
    658,488.40x = 988,193.40 × 422,405.20
  4. Step 4: Simplify right side
    658,488.40x = 417,418,030,765.68
  5. Step 5: Solve for x
    x = 417,418,030,765.68/658,488.40
  6. Step 6: Final answer
    x = 633,903.39

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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.