Home / 418,961.74-628,434.08-103,421.38

Finding the Fourth Proportional to 418,961.74, 628,434.08 and 103,421.38

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Solution

The fourth proportional to 418,961.74, 628,434.08 and 103,421.38 is: 155,129.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,961.74 : 628,434.08 = 103,421.38 : x
  2. Step 2: Convert to fraction form
    418,961.74/628,434.08 = 103,421.38/x
  3. Step 3: Cross multiply
    418,961.74x = 628,434.08 × 103,421.38
  4. Step 4: Simplify right side
    418,961.74x = 64,993,519,792.63
  5. Step 5: Solve for x
    x = 64,993,519,792.63/418,961.74
  6. Step 6: Final answer
    x = 155,129.96

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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.