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Finding the Fourth Proportional to 418,781.77, 628,113.36 and 134,434.89

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Solution

The fourth proportional to 418,781.77, 628,113.36 and 134,434.89 is: 201,633.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,781.77 : 628,113.36 = 134,434.89 : x
  2. Step 2: Convert to fraction form
    418,781.77/628,113.36 = 134,434.89/x
  3. Step 3: Cross multiply
    418,781.77x = 628,113.36 × 134,434.89
  4. Step 4: Simplify right side
    418,781.77x = 84,440,350,797.84
  5. Step 5: Solve for x
    x = 84,440,350,797.84/418,781.77
  6. Step 6: Final answer
    x = 201,633.30

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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.