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Finding the Fourth Proportional to 418,959.21, 628,537.23 and 138,476.46

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Solution

The fourth proportional to 418,959.21, 628,537.23 and 138,476.46 is: 207,747.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,959.21 : 628,537.23 = 138,476.46 : x
  2. Step 2: Convert to fraction form
    418,959.21/628,537.23 = 138,476.46/x
  3. Step 3: Cross multiply
    418,959.21x = 628,537.23 × 138,476.46
  4. Step 4: Simplify right side
    418,959.21x = 87,037,610,588.61
  5. Step 5: Solve for x
    x = 87,037,610,588.61/418,959.21
  6. Step 6: Final answer
    x = 207,747.22

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1.5x scale

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.