Home / 418,962.23-628,434.84-103,421.87

Finding the Fourth Proportional to 418,962.23, 628,434.84 and 103,421.87

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Solution

The fourth proportional to 418,962.23, 628,434.84 and 103,421.87 is: 155,130.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,962.23 : 628,434.84 = 103,421.87 : x
  2. Step 2: Convert to fraction form
    418,962.23/628,434.84 = 103,421.87/x
  3. Step 3: Cross multiply
    418,962.23x = 628,434.84 × 103,421.87
  4. Step 4: Simplify right side
    418,962.23x = 64,993,906,325.95
  5. Step 5: Solve for x
    x = 64,993,906,325.95/418,962.23
  6. Step 6: Final answer
    x = 155,130.71

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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.