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Finding the Fourth Proportional to 418,966.96, 628,548.87 and 138,484.21

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Solution

The fourth proportional to 418,966.96, 628,548.87 and 138,484.21 is: 207,758.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,966.96 : 628,548.87 = 138,484.21 : x
  2. Step 2: Convert to fraction form
    418,966.96/628,548.87 = 138,484.21/x
  3. Step 3: Cross multiply
    418,966.96x = 628,548.87 × 138,484.21
  4. Step 4: Simplify right side
    418,966.96x = 87,044,093,708.34
  5. Step 5: Solve for x
    x = 87,044,093,708.34/418,966.96
  6. Step 6: Final answer
    x = 207,758.85

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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.